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Agilent Technologies 7890A GC System: A Comprehensive Overview
Author: Dr. Anya Sharma, PhD, Analytical Chemistry, with 15 years of experience in chromatography and mass spectrometry applications in the pharmaceutical and environmental industries.
Publisher: Analytical Chemistry Insights, a leading online publisher specializing in analytical chemistry techniques and instrumentation, known for its high-quality, peer-reviewed content and wide readership amongst analytical chemists and researchers.
Editor: Dr. Michael Davis, PhD, Analytical Chemistry, with 20 years of experience in editorial work within the analytical science field.
Keywords: Agilent Technologies 7890A GC system, Gas Chromatography, GC, Agilent 7890A, Analytical Chemistry, Chromatography, Gas Chromatography-Mass Spectrometry (GC-MS), Analytical Instrumentation, Laboratory Equipment
Summary: This article provides a detailed exploration of the Agilent Technologies 7890A GC system, a robust and versatile gas chromatograph widely used in various analytical applications. We discuss its key features, functionalities, applications, advantages, and limitations, providing readers with a comprehensive understanding of this crucial analytical instrument. The article also delves into the technical specifications, maintenance requirements, and troubleshooting techniques associated with the Agilent 7890A GC system. Finally, we explore its place within the broader landscape of analytical instrumentation and its significance in modern analytical chemistry.
1. Introduction to the Agilent Technologies 7890A GC System
The Agilent Technologies 7890A GC system is a high-performance gas chromatograph renowned for its reliability, sensitivity, and versatility. It is a cornerstone instrument in numerous laboratories across diverse industries, including pharmaceuticals, environmental monitoring, food safety, petrochemicals, and forensics. The system's design prioritizes ease of use, efficient operation, and high-quality data acquisition, making it a favored choice for both routine analysis and demanding research applications. The Agilent 7890A GC system offers a comprehensive solution for separating and quantifying volatile and semi-volatile compounds in complex samples. Its modular design allows for customization to meet specific analytical needs, catering to a wide range of applications.
2. Key Features and Functionalities of the Agilent 7890A GC System
The Agilent 7890A GC system boasts several key features that contribute to its superior performance:
High-Efficiency Columns: The system is compatible with a wide range of capillary columns, enabling optimal separation of complex mixtures. The choice of column depends on the specific analytes and application requirements.
Precise Temperature Control: The Agilent 7890A GC offers precise temperature control of the oven, injector, and detector, ensuring accurate and reproducible results. This precision minimizes peak broadening and improves separation efficiency.
Versatile Injection Systems: Various injection techniques are supported, including split/splitless, on-column, and programmed temperature vaporization (PTV), catering to different sample types and concentrations.
Multiple Detector Options: The system is compatible with a variety of detectors, such as flame ionization detectors (FIDs), electron capture detectors (ECDs), thermal conductivity detectors (TCDs), and mass selective detectors (MSDs), providing flexibility in analyte detection based on their properties. This compatibility is a significant advantage of the Agilent 7890A GC system.
Advanced Software: The Agilent ChemStation software provides comprehensive control over the instrument, data acquisition, and analysis. This user-friendly software simplifies operation and streamlines the analytical workflow. The software is capable of handling complex data sets and performing various data processing functions.
Robust Design: The Agilent 7890A GC system is built with robust components designed for long-term reliability and minimal downtime, making it an investment worth considering.
3. Applications of the Agilent Technologies 7890A GC System
The versatility of the Agilent 7890A GC system makes it applicable across a broad spectrum of analytical challenges:
Environmental Monitoring: Analyzing pollutants in air, water, and soil samples.
Pharmaceutical Analysis: Testing the purity and potency of pharmaceutical products.
Food Safety: Detecting contaminants and ensuring food quality.
Petrochemical Industry: Analyzing the composition of petroleum products and other hydrocarbons.
Forensic Science: Identifying and quantifying drugs and other forensic evidence.
Flavor and Fragrance Analysis: Characterizing the volatile compounds in perfumes, essential oils, and foods.
4. Advantages and Limitations of the Agilent 7890A GC System
Advantages:
High sensitivity and resolution
Robustness and reliability
Wide range of compatible detectors and columns
User-friendly software
Versatile injection techniques
Extensive support and documentation
Limitations:
High initial cost
Requires specialized training for operation and maintenance
May not be suitable for all sample types (e.g., highly viscous or non-volatile samples).
5. Maintenance and Troubleshooting of the Agilent 7890A GC System
Regular maintenance is crucial for optimal performance and longevity. This includes:
Regular column conditioning and cleaning
Checking gas flows and pressures
Replacing consumables (septums, liners, etc.)
Periodic calibration and verification of detectors
Troubleshooting common issues, such as ghost peaks, baseline drift, and detector malfunctions, requires systematic investigation and may necessitate consulting the Agilent 7890A GC system's user manual or seeking expert assistance.
6. The Agilent 7890A GC System in the Broader Context of Analytical Instrumentation
The Agilent 7890A GC system represents a significant advancement in gas chromatography technology. Its sophisticated design, combined with its ease of use and versatility, has established it as a gold standard in analytical chemistry. Its modularity allows for customization to suit specific analytical needs, and its compatibility with various detectors expands its application range considerably. It stands as a testament to the ongoing advancements in analytical instrumentation and its critical role in various scientific and industrial fields.
7. Conclusion
The Agilent Technologies 7890A GC system is a powerful and versatile analytical instrument that plays a vital role in numerous scientific and industrial applications. Its robust design, high performance, and user-friendly software make it a valuable asset for laboratories seeking accurate and reliable results. Understanding its features, functionalities, and limitations is essential for effective utilization and successful analytical outcomes. Regular maintenance and proper troubleshooting techniques are also vital in maximizing the instrument's lifespan and ensuring data quality.
FAQs
1. What is the difference between the Agilent 7890A and 7890B GC systems? The 7890B is a successor to the 7890A, offering enhanced features and improved performance in areas such as speed and sensitivity.
2. What type of detectors are compatible with the Agilent 7890A GC system? A wide range, including FID, TCD, ECD, NPD, and MSDs.
3. How much does an Agilent 7890A GC system cost? The cost varies depending on configuration and accessories. It is a significant investment requiring budgetary planning.
4. What is the required level of training to operate an Agilent 7890A GC system? Proper training is crucial, typically provided through vendor courses or specialized training programs.
5. What is the typical maintenance schedule for an Agilent 7890A GC system? A regular schedule incorporating preventative maintenance is essential, guided by the manufacturer’s recommendations.
6. What are the common troubleshooting steps for a malfunctioning Agilent 7890A GC system? Troubleshooting varies based on the specific issue but often involves checking gas flows, column integrity, and detector function.
7. Can the Agilent 7890A GC system be used with different types of sample introduction? Yes, it supports several methods like split/splitless, on-column, and PTV.
8. What software is used for data analysis with the Agilent 7890A GC system? Primarily Agilent OpenLAB CDS ChemStation software.
9. What are the typical applications for the Agilent 7890A GC system in the pharmaceutical industry? Purity testing of active pharmaceutical ingredients (APIs), residual solvent analysis, and degradation product analysis.
Related Articles:
1. Agilent 7890A GC System: A Practical Guide to Method Development: This article provides a step-by-step guide to developing and optimizing GC methods for various applications on the Agilent 7890A.
2. Troubleshooting Common Issues in Agilent 7890A GC Systems: This article focuses on diagnosing and resolving frequent problems encountered while using the Agilent 7890A.
3. Comparative Analysis of Agilent 7890A and other GC Systems: This article compares the Agilent 7890A with competing GC systems from other manufacturers, highlighting their strengths and weaknesses.
4. Advanced Techniques in GC Analysis using the Agilent 7890A System: This article explores advanced techniques such as comprehensive two-dimensional gas chromatography (GCxGC) and its application with the 7890A.
5. Validating Analytical Methods using the Agilent 7890A GC System: This article details the process of validating GC methods according to regulatory requirements, using the Agilent 7890A.
6. Data Analysis and Reporting with Agilent ChemStation Software: This article provides an in-depth guide to using Agilent ChemStation software for processing and analyzing GC data obtained from the 7890A.
7. Maintaining and Calibrating the Agilent 7890A GC System: This article offers a comprehensive guide to preventative maintenance and calibration procedures for the 7890A.
8. Applications of the Agilent 7890A GC System in Environmental Analysis: This article focuses on the use of the 7890A in environmental monitoring, highlighting specific applications and challenges.
9. Coupling the Agilent 7890A GC System with Mass Spectrometry (GC-MS): This article discusses the benefits and applications of coupling the Agilent 7890A with a mass spectrometer for enhanced analytical capabilities.
| agilent technologies 7890a gc system: Gas Chromatography Bekir Salih, Ömür Çelikbıçak, 2012-03-09 Gas Chromatography involves the study of various vaporizable molecules in chemistry and the other related research fields. This analytical method has a number of features and advantages that make it an extremely valuable tool for the identification, quantification and structural elucidation of organic molecules. This book provides detailed gas chromatography information to applications of biochemicals, narcotics and essential oils. The details of the applications were briefly handled by the authors to increase their comprehensibility and feasibility. This guide should be certainly valuable to the novice, as well as to the experienced gas chromatography user who may not have the enough experience about the specific applications covered in this book. We believe this book will prove useful in most laboratories where modern gas chromatography is practiced. |
| agilent technologies 7890a gc system: Selective Detectors Robert E. Sievers, 1995-04-03 A timely and authoritative review of the current state of selective detector technology This book was written for professionals who need to keep abreast of the latest developments and emerging trends in selective detectors and their applications. It comprises contributions from many of the leading innovators and pioneers in the field, including James Lovelock, inventor of the electron capture detector, whose own contribution is certain to be a rich source of ideas and inspiration for all who read it. Offering a balanced presentation of theory and practice, Selective Detectors: Reviews the theory and underlying principles of a broad range of devices Discusses, in detail, capabilities and current applications, with an emphasis on interdisciplinary applications, including environmental, petrochemical, biomedical, and quality control Explores, in depth, the latest advances and emerging technologies Arms readers with a wealth of practical how-to information on selecting, using, modifying, and building selective detectors for a wide range of applications Future historians studying the late twentieth century will almost certainly come to view the advent of selective detectors as among the truly formative technological developments of the period. Anyone who doubts this thesis need only consider the impact of selective detection on environmental quality, the sciences, technology, medicine, business and industry, public policy, quality control, and many other fields. Yet, despite the obvious importance of selective detectors, there continues to be a scarcity of books dedicated to helping professionals keep abreast of the latest developments and emerging trends in this in fluential technology. This timely and authoritative review of the current state of selective detector technology fills that gap. This book focuses on the newest selective detectors for chromatographic analysis. Conceived and shepherded into existence by a major figure in analytical chemistry and environmental analysis, it includes contributions from many of the leading innovators and pioneers in the field. Most prominent among these is Dr. James Lovelock, inventor of the electron capture detector, whose chapter on the history and development of selective detectors will be a rich source of ideas and inspiration for all who read it. Offering a balanced presentation of theory and practice, Selective Detectors reviews the theory and underlying principles of selective detectors; discusses, in detail, their current capabilities and applications; explores the latest advances and emerging technologies; and arms readers with a wealth of practical how-to information on selecting, using, modifying, and building selective detectors for a wide range of applications. Selective Detectors is an invaluable resource for analytical chemists and technicians working in a variety of disciplines, including environmental science, petrochemical industries, the food and beverage industries, biotechnology, medicine, and more. |
| agilent technologies 7890a gc system: Gas Chromatography Peter Kusch, 2019-09-04 Gas chromatography (GC) is one of the most important types of chromatography used in analytical chemistry for separating and analyzing chemical organic compounds. Today, gas chromatography is one of the most widespread investigation methods of instrumental analysis. This technique is used in the laboratories of chemical, petrochemical, and pharmaceutical industries, in research institutes, and also in clinical, environmental, and food and beverage analysis. This book is the outcome of contributions by experts in the field of gas chromatography and includes a short history of gas chromatography, an overview of derivatization methods and sample preparation techniques, a comprehensive study on pyrazole mass spectrometric fragmentation, and a GC/MS/MS method for the determination and quantification of pesticide residues in grape samples. |
| agilent technologies 7890a gc system: Practical Gas Chromatography Katja Dettmer-Wilde, Werner Engewald, 2014-11-05 Gas chromatography continues to be one of the most widely used analytical techniques, since its applications today expand into fields such as biomarker research or metabolomics. This new practical textbook enables the reader to make full use of gas chromatography. Essential fundamentals and their implications for the practical work at the instrument are provided, as well as details on the instrumentation such as inlet systems, columns and detectors. Specialized techniques from all aspects of GC are introduced ranging from sample preparation, solvent-free injection techniques, and pyrolysis GC, to separation including fast GC and comprehensive GCxGC and finally detection, such as GC-MS and element-specific detection. Various fields of application such as enantiomer, food, flavor and fragrance analysis, physicochemical measurements, forensic toxicology, and clinical analysis are discussed as well as cutting-edge application in metabolomics is covered. |
| agilent technologies 7890a gc system: Design and construction of microbial cell factories for the production of fuels and chemicals Tian-Qiong Shi, Xiao-Jun Ji, Boyang Ji, Mingfeng Cao, Farshad Darvishi, 2023-05-12 |
| agilent technologies 7890a gc system: Sensorial and analytical profiling of orange juice and apple juice Sabrina Kotter-Seel, 2018-01-26 In the modern product development process, newly developed products have to be tested in terms of their analytical and sensorial stability throughout the whole shelf-life. A real-time storage at ambient conditions until reaching the best before date is not efficient considering the required time and in commercial resources. Therefore, accelerated shelf-life testing (ASLT) has become a central step in the usual product development procedure. The objective of this work was the development and establishment of prediction models regarding the stability and shelf-life of orange juice and apple juice. To this end, the juices were stored at different temperatures and were investigated regarding their sensory profiles by quantitative descriptive analysis (QDA) and their compositions of volatiles by untargeted profiling via GC-MS. The final prediction models were derived by combination of the sensory and volatiles-related data sets in a holistic prediction approach. |
| agilent technologies 7890a gc system: Pyrolysis-gas Chromatography: Mass Spectrometry Of Polymeric Materials Peter Kusch, 2018-10-08 The methodology of analytical pyrolysis-GC/MS has been known for several years, but is seldom used in research laboratories and process control in the chemical industry. This is due to the relative difficulty of interpreting the identified pyrolysis products as well as the variety of them. This book contains full identification of several classes of polymers/copolymers and biopolymers that can be very helpful to the user. In addition, the practical applications can encourage analytical chemists and engineers to use the techniques explored in this volume.The structure and the functions of various types of pyrolyzers and the results of the pyrolysis-gas chromatographic-mass spectrometric identification of synthetic polymers/copolymers and biopolymers at 700°C are described. Practical applications of these techniques are also included, detailing the analysis of microplastics, failure analysis in the automotive industry and solutions for technological problems. |
| agilent technologies 7890a gc system: Long Term Stability and Permeability of Mixed Ion Conducting Membranes under Oxyfuel Conditions Xiaoyu Li, 2014-03-20 Keine Angaben |
| agilent technologies 7890a gc system: Biotechnology of Microalgae, Based on Molecular Biology and Biochemistry of Eukaryotic Algae and Cyanobacteria Takashi Osanai, Youn-Il Park, Yuki Nakamura, 2017-04-04 |
| agilent technologies 7890a gc system: Pyrolysis-gas Chromatography/mass Spectrometry Of Polymeric Materials (Second Edition) Peter Kusch, 2023-08-28 Readers will find many practical applications of pyrolysis-GC/MS as well as R&D usage in this newly revised and expanded edition. Detailed experimental descriptions for the identification of synthetic polymers and copolymers are included. This volume presents the current state of analytical pyrolysis, and contains full identification of several classes of polymers/copolymers and biopolymers that readers will find helpful. Structures and functions of various types of pyrolyzers are explored, as well as the results of the pyrolysis-gas chromatographic-mass spectrometric identification of synthetic polymers/copolymers and biopolymers at 700°C.Practical applications of this hyphenated technique, detailing the analysis of microplastics, failure analysis in the automotive industry and solutions for technological problems are provided. Numerous practical applications of pyrolysis-GC/MS, for industrial and R&D usage, will be of benefit to Chemists and Engineers, as well as for students of Chemistry and Polymer Sciences. |
| agilent technologies 7890a gc system: Chemical Signals in Vertebrates 14 Christina D. Buesching, 2019-07-19 In August 2017, the Chemical Signals in Vertebrates (CSiV) group held its 14th triennial meeting at Cardiff University in Wales. This well established international conference brings together leaders and students in the field of olfactory communication and chemical signaling of vertebrates to present new advances in their research as well as synopses of disparate areas under new angles. This volume is a collection of the proceedings of this meeting authored by leading experts in this field that covers a wide variety of topics in chemical ecology. |
| agilent technologies 7890a gc system: Direct Microbial Conversion of Biomass to Advanced Biofuels Michael E Himmel, 2015-05-19 'Direct Microbial Conversion of Biomass to Advanced Biofuels' is a stylized text that is rich in both the basic and applied sciences. It provides a higher level summary of the most important aspects of the topic, addressing critical problems solved by deep science. Expert users will find new, critical methods that can be applied to their work, detailed experimental plans, important outcomes given for illustrative problems, and conclusions drawn for specific studies that address broad based issues. A broad range of readers will find this to be a comprehensive, informational text on the subject matter, including experimentalists and even CEOs deciding on new business directions. - Describes an important new field in biotechnology, the consolidated conversion of lignocellulosic feedstocks to advanced fuels - Up-to-date views of promising technologies used in the production of advanced biofuels - Presents the newest ideas, well-designed experiments, and outcomes - Provides outstanding illustrations from NREL and contributing researchers - Contains contributions from leaders in the field that provide numerous examples and insights into the most important aspects of the topic |
| agilent technologies 7890a gc system: The Use of Phytogenic Feed Additives to Enhance Productivity and Health in Ruminants Ahmed E. Kholif, Uchenna Anele, Amlan Kumar Patra, Zora Varadyova, 2021-07-02 |
| agilent technologies 7890a gc system: Terpene Synthases , 2024-06-28 Terpene Synthases, Volume 700 in the Methods in Enzymology series, continues the legacy of this highly respected laboratory standard with its first dedicated collection on this important family of enzymes. Terpene synthases are a diverse set of enzymes that use exquisite mechanisms to form complex (poly)cyclic hydrocarbon skeletons. Chapters in this new volume include Structural analysis by X-ray crystallography and cryo-EM, Understanding mechanisms using stable isotopes, substrate analogs, or computational tools, Engineering fusion enzymes, Ancestral terpene cyclases, as well as the Sequence, structure, and function of non-canonical terpene synthases. - Presents the only collection of current methodology for the investigation of terpene synthases, with topics including from bioinformatics, enzymology, computational chemistry, and engineering - Includes chapters authored by international experts in the field - Provides the latest contributions in the leading serial Methods in Enzymology |
| agilent technologies 7890a gc system: Sperm Differentiation and Spermatozoa Function: Mechanisms, Diagnostics, and Treatment Tomer Avidor-Reiss, Zhibing Zhang, Xin Zhiguo Li, 2020-05-22 |
| agilent technologies 7890a gc system: Flavoromics Leo Nollet, Matteo Bordiga, 2023-12-18 Forty years of progress in the fields of gas chromatography and data collection have culminated in flavoromics. This is a combination of chemometrics and metabolomics. Essentially, it is the non-targeted way of rapidly collecting a significant amount of data from a wide range of sample populations and using the data to study complicated topics. Now that we have the required tools, we can carry out high-throughput trace investigations that incorporate both gustatory and olfactory signals. Flavoromics: An Integrated Approach to Flavor and Sensory Assessment describes the tools to do high-throughput, trace analyses that represent both taste and olfaction stimuli. It explains how today's single sample research will generate thousands of data points, which are loaded into sophisticated statistical analysis algorithms to establish what stimuli are responsible for flavor. This cutting-edge equipment will enable us to create flavorings and perfumes that are more realistic and superior. Key Features: Includes a detailed section on data handling/mining Section 4 describes a broad overview of different food matrices Points out the integration of flavoromics with advanced separation methods, data management, statistical modeling, and variable selection This book represents a revolutionary tool waiting to help make better, truer to life flavorings and fragrances. |
| agilent technologies 7890a gc system: Genotoxic Impurities Andrew Teasdale, 2011-03-29 This book examines genotoxic impurities and their impact on the pharmaceutical industry. Specific sections examine this from both a toxicological and analytical perspective. Within these sections, the book defines appropriate strategies to both assess and ultimately control genotoxic impurities, thus aiding the reader to develop effective control measures. An opening section covers the development of guidelines and the threshold of toxicological concern (TTC) and is followed by a section on safety aspects, including safety tests in vivo and vitro, and data interpretation. The second section addresses the risk posed by genotoxic impurities from outside sources and from mutagens within DNA. In the final section, the book deals with the quality perspective of genotoxic impurities focused on two critical aspects, the first being the analysis and the second how to practically evaluate the impurities. |
| agilent technologies 7890a gc system: Applied Environmental Metabolomics David J. Beale, Katie E. Hillyer, Andrew C. Warden, Oliver A.H. Jones, 2022-06-09 Applied Environmental Metabolomics: Community Insights and Guidance from the Field brings together contributions from global experts who have helped to define and develop the exciting and rapid advances that are taking place in the field of environmental metabolomics. This book is aimed at expert users, students, researchers, and academics in metabolomics and systems biology. It not only demonstrates the best practice in experimental design but also provides insight into state-of-the-art instrumentation and the depth of analysis one can expect to get by using various sampling, chromatographic, mass spectrometric, and nuclear magnetic resonance (NMR) techniques. Common experimental and technical pitfalls are also highlighted. This book provides a unique insight into the world of environmental metabolomics and will help the practicing scientist avoid repeating similar costly mistakes, steering them efficiently toward the generation of high-quality data and high-impact publications. - Highlights overarching principles and considerations for researchers to leverage when planning, conducting, and evaluating environmental metabolomics research - Applies key insights and lessons learned from leaders in the field - Provides real-world case study applications of multiple environmental metabolomics techniques - Integrates the Metabolomics Standards Initiative into case study examples - Encompasses standard operating protocols for metabolomics to help new entrants to the field |
| agilent technologies 7890a gc system: Proceedings of ICE-SEAM 2021: Special Edition Mohd Fadzli Bin Abdollah, 2022-04-01 This e-book is a compilation of papers presented at the 7th International Conference and Exhibition on Sustainable Energy and Advanced Materials (ICE-SEAM 2021) - Virtual Platform, Malaysia on 23 November 2021. This special edition of proceedings has 17 selected papers that focus on IR4.0, including 3D printing and advanced materials, and how it might impact energy systems in numerous ways for sustainable development, especially during the pandemic COVID19. |
| agilent technologies 7890a gc system: Sustainable Chemistry Research Ponnadurai Ramasami, 2023-10-23 This edited book of proceedings is a collection of nineteen selected and peer-reviewed contributions from the Virtual Conference on Chemistry and its Applications (VCCA-2022). VCCA-2022 was held online from 8th to 12th August 2022. The theme of the conference was Resilience and Sustainable Research through Basic Sciences. 500 participants from 55 countries participated in VCCA-2022. This volume 1 reflects the chapters covering chemical and biochemical aspects. |
| agilent technologies 7890a gc system: Natural Product Experiments in Drug Discovery Karuppusamy Arunachalam, Xuefei Yang, Sreeja Puthanpura Sasidharan, 2022-09-20 This detailed volume explores a wide range of evidence-based complementary medicine and various bio-analytical techniques used to define botanical products. Collecting recent work and current developments in the field of contemporary phytomedicine as well as their future possibilities in human health care, the book includes unique contributions in the form of chapters on phytomedicine and screening biological activities explained with diverse hyphenated techniques, as well as issues related to herbal medications, such as efficacy, adulteration, safety, toxicity, regulations, and drug delivery. Written for the Springer Protocols Handbooks series, chapters feature advice from experts on how to best conduct future experiments. Extensive and practical, Natural Product Experiments in Drug Discovery serves as an ideal reference for students, professors, and researchers in universities, R&D institutes, pharmaceutical and herbal enterprises, and health organizations. |
| agilent technologies 7890a gc system: Isolation and Structure Elucidation of Bioactive Compounds (Dedicated to the memory of the late Professor Charles D. Hufford) Muhammad Ilias, Charles L. Cantrell, 2019-04-11 We are very pleased to introduce the Book Version of our Special Issue in Molecules dedicated to the memory of the late Professor Dr. Charles D. Hufford. The issue has been a huge success, with 22 full-length peer-reviewed papers and a tribute by Professor Alice M.Clark. Authors, reviewers, and collaborators from many countries across the worldhave contributed to this endeavour, and we are truly grateful to all. This Special Issue isrepresentative of the broad impact that “Charlie” had on the field of bioactive naturalproducts. This Special Issue comprises papers from Professor Hufford’s former students,colleagues, and collaborators throughout the world who have utilized a wide array ofstate-of-the-art techniques to examine diverse natural sources to isolate and identify avariety of natural products with a wide spectrum of biological activities, including somenew microbial transformations and insights into bioactive molecules. Many new bioactive compounds are described and reported here for the first time. Bioactivities reportedinclude cytotoxicity, antimicrobial activity, anti-inflammatory activity, antileishmanialactivity, antitrypanosomal activity, antimalarial activity, analgesic activity, and beneficialliver activities, just to name a few. This Special Issue will undoubtedly have a lasting impact on the field of bioactive natural products, as exemplified by the career of Dr. Hufford. Lastly, without the timely and outstanding contributions from all of you, this Special Issue would not have been possible. We thank you all very much for your contributions and your time devoted to this Special Issue in memory of a special person. Finally, we express ourgratitude and thanks to the journal Molecules and their excellent team of expert reviewers for giving us the support and opportunity to make this Special Issue a huge success! |
| agilent technologies 7890a gc system: Hydrothermal Technology in Biomass Utilization & Conversion David Chiaramonti, Andrea Kruse, Marco Klemm, 2020-04-30 This book addresses a key innovative technology for decarbonization of the energy system: hydrothermal processing. It basically consists of treating biomass and wastes in a wet form, under pressure and temperature condition. This approach is becoming more and more attractive, as new feedstock and applications are appearing on the scene of bioeconomy and bioenergy. The hydrothermal processing of various type of biomass, waste, and residues, thus, raised the interest of many researchers and companies around the world, together with downstream upgrading processes and technologies: solid products as biochar, for instance, or liquid ones as crude bioliquids, are finding new market opportunities in circular economy schemes. The Special Issue collects recent innovative research works in the field, from basic to applied research, as well as pilot industrial applications/demo. It is a valuable set of references for those investing time and effort in research in the field. |
| agilent technologies 7890a gc system: The Importance of Assessing Health Status and Health Behavioral Characteristics in Children Arlinda Cerga Pashoja, 2022-11-08 |
| agilent technologies 7890a gc system: Advanced Gas Chromatography Mustafa Ali Mohd, 2012-03-21 Progress in agricultural, biomedical and industrial applications' is a compilation of recent advances and developments in gas chromatography and its applications. The chapters cover various aspects of applications ranging from basic biological, biomedical applications to industrial applications. Book chapters analyze new developments in chromatographic columns, microextraction techniques, derivatisation techniques and pyrolysis techniques. The book also includes several aspects of basic chromatography techniques and is suitable for both young and advanced chromatographers. It includes some new developments in chromatography such as multidimensional chromatography, inverse chromatography and some discussions on two-dimensional chromatography. The topics covered include analysis of volatiles, toxicants, indoor air, petroleum hydrocarbons, organometallic compounds and natural products. The chapters were written by experts from various fields and clearly assisted by simple diagrams and tables. This book is highly recommended for chemists as well as non-chemists working in gas chromatography. |
| agilent technologies 7890a gc system: Analysis of Pesticide in Tea Guo-Fang Pang, 2018-08-18 Analysis of Pesticide in Tea: Chromatography-Mass Spectrometry Methodology is a comprehensive book, providing serial, rapid, high-throughput analytical methods for determining more than 600 pesticides in tea. There are increasing numbers of strict limit standards for pesticide residues in edible agricultural products in countries all over the world. The threshold for pesticide residues in tea is high for international trade. At present, 17 countries and international organizations have stipulated MRL levels for over 800 pesticide residues in tea. All methods described in this book are validated by an independent, U.S.-based organization (AOAC International), and all indexes have satisfied AOAC International's criteria. China has a history of 5000 years in growing tea and is a large tea producer with 80 million people involved in tea growing. China exports tea to over 100 countries worldwide, enjoying a high reputation for quality and variety. - Covers a wide range of research activities that are highly appropriate to current research methods - Reflects the most recent research in nearly all cases, providing an excellent compilation of feasible methods needed for official analysis - Describes methods that are internationally validated by an independent, U.S.-based organization (AOAC International) - Authored by Dr. Pang, who is internationally recognized in the area of pesticide residues and other contaminants in foods |
| agilent technologies 7890a gc system: Persistent Organic Pollutants in Human Milk Rainer Malisch, Peter Fürst, Kateřina Šebková, 2023-11-12 This open access book reviews the trends of persistent organic pollutants (POPs) in human milk and discusses the main findings of five global surveys that were coordinated by the World Health Organization (WHO) and the United Nations Environment Programme (UNEP) from 2000 to 2019. Human milk was selected as core matrix for human exposure under the Global Monitoring Plan for effectiveness evaluation of the Stockholm Convention on Persistent Organic Pollutants. Milk from well-defined groups of mothers was collected and mixed to form a representative sample per country. Datasets collected represent the largest global human tissues survey with a harmonized protocol, carried out in a uniform format for more than two decades. Altogether 69 countries participated in these studies between 2000 and 2015, and more than 40 countries participated in the study from 2016 to 2019. Divided into 5 parts, the book offers an authoritative overview of human milk biomonitoring; collates the harmonized sampling requirements and analytical methods for the identification and quantification of contaminants in human milk; examines the results of the WHO/UNEP-coordinated exposure studies, including the identification of selected chlorinated pesticides, dioxin-like compounds, industrial chemicals like polychlorinated biphenyls (PCB) and chlorinated paraffins, polybrominated POPs and PFAS, among others; and traces geographic, temporal and cross-substance trends and correlations, and human health risks. The book finishes by providing the reader with the summary of the main findings and outlook from these studies, in which the comparison of concentrations found for the wide range of POPs listed in the Stockholm Convention allowed the identification of possible needs for actions and follow-ups in different countries/regions. This book contributes to the understanding of exposure to hazardous chemicals and pollution as addressed by the UN Sustainable Development Goals on Good Health and Well-being (SDG 3) and will appeal to environmental and analytical chemists, researchers, professionals, and policymakers interested in learning more about contaminants in human milk. Given its breadth, this book will also appeal to a broader audience interested in maternal and child health. |
| agilent technologies 7890a gc system: Biological Activity of Natural Secondary Metabolite Products Toshio Morikawa, 2018-09-20 This book is a printed edition of the Special Issue Biological Activity of Natural Secondary Metabolite Products that was published in IJMS |
| agilent technologies 7890a gc system: Chemical Signals in Vertebrates 13 Bruce A. Schulte, Thomas E. Goodwin, Michael H. Ferkin, 2015-12-09 In 2014, the Chemical Signals in Vertebrates (CSiV) group held its 13th triennial meeting in conjunction with the 30th meeting of the International Society of Chemical Ecology (ISCE). The meeting convened on the campus of the University of Illinois at Urbana-Champaign. This meeting was the first held jointly with these two groups, which share common history and are dedicated to understanding the role of chemical communication in the lives of organisms. This volume is a collection of the proceedings of this meeting and, like the meeting, cover a variety of topics in chemical ecology, including Chemical Ecology of Social Behavior; Chemical Signals – Analysis and Synthesis; Evolution, Genomics, and Transcriptomics of Chemical Signals; Molecular Mechanisms of Semiochemical Perception and Processing; Multimodal Communication; and Neuroethology and Neurophysiology. |
| agilent technologies 7890a gc system: Re-emergence of Natural Products for Drug Discovery in Honor of Prof. Dr. M. Iqbal Choudhary Hidayat Hussain, Hina Siddiqui, Ioannis P. Gerothanassis, 2024-02-29 This Research Topic will honor Prof. M. Iqbal Choudhary for his pioneering contribution in the field of Bioorganic, Synthetic, and Natural Product Chemistry. Prof. M. Iqbal Choudhary is Director and Professor of Bioorganic and Natural Product Chemistry at the International Center for Chemical and Biological Sciences (H. E. J. Research Institute of Chemistry and Dr. Panjwani Center for Molecular Medicine and Drug Research), Pakistan and Coordinator General COMSTECH. Since 1990, Prof. Choudhary has been among the world leaders in the field of natural product chemistry, and has made pioneering contributions in the discovery of novel natural products. Prof. Choudhary has 1,212 publications (cumulative impact of > 2500) with 33,550 citations (h index 76) in the fields of organic and bioorganic chemistry. He also published 94 patents (64 US Patents), 90 books and 40 chapters in books, published by major U.S. and European presses. He discovered many potent anti-epileptic and anti-leishmanial compounds from indigenous medicinal plants that are under clinical trials. His contributions to reverse bacterial resistance to antibiotics represent seminal contributions in this important field. He has trained hundreds of young researchers, especially women, from across the Afro-Asian region in natural product chemistry and established several research centers in Pakistan, and helped to setup research units in Africa, and South and Central Asia. His scientific contributions have been recognized by prestigious national and international awards and honors, and fellowships of several academies of science. |
| agilent technologies 7890a gc system: Green Chemistry in Environmental Sustainability and Chemical Education Virinder S. Parmar, Priti Malhotra, Divya Mathur, 2018-08-13 Chemistry is considered to be one of the prime causes of environmental pollution and degradation. The United Nations General Assembly also addressed the environmental challenges in its Sustainable Development Goals (SDGs), which have been adopted in 2015. A closer look shows that to meet these goals chemistry will play an important role. Green chemistry encompasses design and synthesis of environmentally benign chemical processes, green approaches to minimize and/or remediate environmental pollution, the development of biomaterials, biofuel, and bioenergy production, biocatalysis, and policies and ethics in green chemistry. When products in use today become waste, we need to treat that waste so that hazardous substances are not re-circulated into new products. In this context, circular economy is also an important point of discussion, which focuses on recycling, reuse and use of renewable sources. The theme of the International Conference on Green Chemistry in Environmental Sustainability & Chemical Education (ICGC-2016) held in Delhi from 17-18 November 2016 was to discuss the emerging green trends in the direction of sustainability and environmental safety. ICGC-2016 consisted of keynote, plenary and invited lectures, panel discussion, contributed oral papers and poster presentations. The conference provided a platform for high school students, undergraduate and postgraduate students, teaching fraternity and young researchers to interact with eminent scientists and academicians from all over the world who shared their valuable views, experience and research on the harmonious methods in chemistry for a sustainable environment. This volume of proceedings from the conference provides an opportunity for readers to engage with a selection of refereed papers that were presented during the ICGC-2016 conference. The overarching goal of this book is to discuss most recent innovations and concerns in green chemistry as well as practical challenges encountered and solutions adopted to remediate a scathed environment into a pristine one. It includes an extensive variety of contributions from participants of ICGC-2016 that demonstrate the importance of multidisciplinary and interdisciplinary approach to problem solving within green chemistry and environmental management. The proceedings is thus a green chemistry monograph resulting from the fruitful deliberations in the conference, which will deeply enhance awareness about our responsibility towards the environment. |
| agilent technologies 7890a gc system: Practicable Artificial Photosynthesis - The Only Option Available Today for Humankind To Make Energy, Environment, Economy & Life Sustainable on Earth Ibram Ganesh, 2023-04-05 The “Practicable Artificial Photosynthesis (PAP)” technology described in this book facilitates one to harvest sunlight to meet all the energy needs of the society without any back-up from fossil fuels to meet all the energy needs of the society by using carbon dioxide and water as energy storing materials. The PAP process can completely eradicate the poverty and unemployment across the globe, and it can solve the problems of CO2 associated global warming and the related social cost of carbon problems completely. Four new technologies invented and discovered by the author of this book as a part of developing this comprehensive PAP process including a brand-new technology “Semiconductor and Liquid Assisted Photothermal Effect (SLAPE)” to generate electricity from sunlight with highest efficiency at lowest expenditure have also been presented and described in this book for the first time. Ultra-low cost EPDM rubber based membranes needed for alkaline electrolyzers and fuel cells also introduced in this book. |
| agilent technologies 7890a gc system: Marine Lipids 2017 Rosário Domingues, Ricardo Calado, Pedro Domingues, 2018-04-17 This book is a printed edition of the Special Issue Marine Lipids 2017 that was published in Marine Drugs |
| agilent technologies 7890a gc system: Natural Methane Emissions in a Changing Arctic - Implications for Climate and Environment Karin Andreassen, Jochen Knies, Susanne Liebner, Andrew Jonathan Hodson , Carolyn Ruppel, 2024-11-06 Natural emissions of methane have received much attention over the last decade due to the documented increase of methane in the atmosphere and high global warming potential relative to CO2. Over the past few decades the Arctic has been warming approximately four times faster than the rest of the planet, driving a pressing need to assess the current and future vulnerability of various natural methane sources. In the Arctic, vast amounts of methane is stored in soils and permafrost or is being generated as permafrost thaw continues. Additionally, there are large stores of methane in Arctic gas hydrates, a solid form of concentrated methane and water, and in numerous settings, including deep-water marine areas, on continental shelves hosting relict subsea permafrost and gas hydrate, in and beneath onshore permafrost, and likely beneath the Greenland Ice Sheet. Continued climate warming is making methane leakage more likely. Even deeper conventional gas reservoirs could leak methane as the overlying permafrost degrades. |
| agilent technologies 7890a gc system: Catalysis for the Production of Sustainable Fuels and Chemicals Flora T. T. Ng , Ajay K. Dalai, 2020-12-29 Catalysis, in the industrial production of chemicals, fuels, and materials, accounts for more than half of gross material production worldwide. Heterogeneous catalysis enables fast and selective chemical transformations, resulting in superior product yield and facilitating catalyst separation and recovery. The synthesis of novel catalysts has emerged as a hot topic for process and product development with numerous research publications and patents. Hence, development of efficient catalysts and their applications is important for sustainable energy production and use, green chemicals production and use, and economic growth. This Special Issue discusses recent developments related to catalysis for the production of sustainable fuels and chemicals and traverses many new frontiers of catalysis including synthesis, characterization, catalytic performances, reaction kinetics and modelling, as well as applications of catalysts for the production of biofuels, synthesis gas, and other green products. This covers the current state-of-the-art catalysis research applied to bioenergy, organic transformation, carbon–carbon and carbon–heteroatoms, reforming, hydrogenation, hydrodesulfurization, hydrodenitrogenation, hydrodemetalization, Fischer–Tropsch synthesis, to name a few. This book highlights new avenues in catalysis including catalyst preparation methods, analytical tools for catalyst characterization, and techno-economic assessment to enhance a chemical or biological transformation process using catalysts for a betterment of industry, academia and society. |
| agilent technologies 7890a gc system: Clyfford Still Susan F. Lake, Barbara A. Ramsay, 2022-04-05 This groundbreaking book provides the first detailed account of the materials and techniques of perhaps the most radical—and until now, least studied—major American Abstract Expressionist. Among the most radical of the great American Abstract Expressionist painters, Clyfford Still has also long been among the least studied. Still severed ties with the commercial art world in the early 1950s, and his estate at the time of his death in 1980 comprised some 3,125 artworks—including more than 800 paintings—that were all but unknown to the art world. Susan F. Lake and Barbara A. Ramsay were granted access to this collection by the estate and by the Clyfford Still Museum in Denver, which houses this immense corpus today. This volume, based on the authors’ materials research and enriched by their unprecedented access to Still’s artworks, paints, correspondence, studio records, and personal library, provides the first detailed account of his materials, working methods, and techniques. Initial chapters provide an engaging and erudite overview of the artist's life. Subsequent chapters trace the development of his visionary style, offer in-depth materials analysis of selected works from each decade of his career, and suggest new approaches to the care and conservation of his paintings. There is also a series of technical appendices as well as a full bibliography. |
| agilent technologies 7890a gc system: Processing Contaminants in Edible Oils , 2015-08-15 This book discusses the current research on monochloropropanediol (MCPD) and glycidyl esters in edible oils. These potentially harmful contaminants are formed during the industrial processing of food oils during deodorization. The mechanisms of formation for these contaminants, as well as research identifying possible precursor molecules are reviewed. Strategies which have been used successfully to decrease the concentrations of these contaminants in edible oils are discussed, including the removal of precursor molecules before processing, modifications of deodorization protocol, and approaches for the removal of these contaminants after the completion of processing. Analytical strategies for accurate detection and quantitation of MCPD and glycidyl esters are covered, along with current information on their toxicological properties. This book serves as a single point of reference for the significant research related to these contaminants. Details the mechanisms of formation for these contaminants and research identifying possible precursor molecules Presents successful strategies to decrease the concentrations of these contaminants in edible oils Includes the analytical strategies for accurate detection and quantitation of the contaminants along with their toxicological properties. |
| agilent technologies 7890a gc system: Crop Improvement by Omics and Bioinformatics Yan Zhao, Jun Li, Zhichao Wu, Xueqiang Wang, 2024-04-11 Crop improvement has been continuously driven by the demand for food security and sustainability. The caloric and nutritional needs of a growing world population require that global food production increase by one billion tons over the next few decades, but the current growth rate falls far short. Moreover, rapid changes in the environment are accelerating land degradation, aggravating pests and diseases, introducing extreme stresses, and reducing crop productivity. Genetic technologies and molecular breeding tools offer novel opportunities for modern crop breeding. In the past few decades, remarkable progress has been achieved in the discovery of genes for crop yield, quality, and resistance and in the dissection of plant molecular mechanisms. With the continuous advancement in sequencing technology, molecular markers, and gene editing, a large number of excellent crop varieties have been cultivated. |
| agilent technologies 7890a gc system: The Cellular Biomineralization Pathways of Marine Organisms Andrew Stanley Mount, Alfred Portius Wheeler, Vera Bin San Chan, 2022-01-05 |
| agilent technologies 7890a gc system: Engineering microalgal chassis cells Xuefeng Lu, Martin Hagemann, Jin Liu, Pratyoosh Shukla, Xiaoming Tan, 2023-07-20 |
Capillary Column Installation Quick Reference Guide - Agilent …
Nov 10, 2022 · This Information Applies To: Agilent GC Systems Issue The data rate determines the number of sampling points across the chromatographic peak and the sample background. …
General Recommendations for Using an Agilent RID
Nov 10, 2022 · All Agilent degassers can be used except for G1379A and G1379B. Always have a thermostatted column compartment (TCC) / multicolumn thermostat (MCT) in your stack. …
4150 and 4200 TapeStation - Wiki - Automated Electrophoresis
Here is a collection of Agilent 4150 and 4200 TapeStation Resources. Links to user manuals , application resources and technical notes , quick guides , software
How to Bake-out the Split/Splitless Inlet (S/SL) on Agilent GC …
Nov 10, 2022 · This Information Applies To: Agilent 7697A headspace sampler. Issue: The headspace sampler may present a flow shutdown or poor chromatography with decreased …
How to Check, Configure and Use the IP Address of an Agilent LC …
Nov 10, 2022 · Agilent HPLC modules can be configured to use either a default IP address (192.168.254.11) that cannot be changed (static), or a stored IP address that can be defined …
Recommended Column Nut and Ferrule Combinations for GC and …
Jul 17, 2024 · This Information Applies To: Agilent 6850, 6890, 7820, 7890, 8850, 8860, 8890, Intuvo 9000 GC Systems with a Thermal Conductivity Detector (TCD) Issue The TCD …
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Seahorse Analytics - the newest data analysis application for the Agilent Seahorse XF Analzyer Products. Seahorse XF Assay Learning Center - a learning center designed to introduce you …
Collection of 7000 and 7010 Triple Quadrupole GC/MS Resources
This collection of Agilent triple quadrupole (TQ) GC/MS resources includes l inks to user manuals, reference guides, application notes and videos for the 7000 Series Triple Quadrupole GC/MS …
Collection of 8890, 8860, 8850, Intuvo 9000, 990 ... - Agilent …
This is a collection of popular Agilent GC resources, including user manuals, application notes, troubleshooting information, tools, and supplies on Agilent.com. Go to Collection of GC/MS …
Setting up and Running the MassHunter Optimizer Tool
Oct 13, 2023 · This information applies to: Agilent 6400 Triple Quadrupole LC/MS systems, MassHunter Workstation 10.1 or earlier. Issue The MassHunter Optimizer tool allows users to …
Capillary Column Installation Quick Reference Guide - Agilent …
Nov 10, 2022 · This Information Applies To: Agilent GC Systems Issue The data rate determines the number of sampling points across the chromatographic peak and the sample background. …
General Recommendations for Using an Agilent RID
Nov 10, 2022 · All Agilent degassers can be used except for G1379A and G1379B. Always have a thermostatted column compartment (TCC) / multicolumn thermostat (MCT) in your stack. …
4150 and 4200 TapeStation - Wiki - Automated Electrophoresis
Here is a collection of Agilent 4150 and 4200 TapeStation Resources. Links to user manuals , application resources and technical notes , quick guides , software
How to Bake-out the Split/Splitless Inlet (S/SL) on Agilent GC …
Nov 10, 2022 · This Information Applies To: Agilent 7697A headspace sampler. Issue: The headspace sampler may present a flow shutdown or poor chromatography with decreased …
How to Check, Configure and Use the IP Address of an Agilent LC …
Nov 10, 2022 · Agilent HPLC modules can be configured to use either a default IP address (192.168.254.11) that cannot be changed (static), or a stored IP address that can be defined …
Recommended Column Nut and Ferrule Combinations for GC and …
Jul 17, 2024 · This Information Applies To: Agilent 6850, 6890, 7820, 7890, 8850, 8860, 8890, Intuvo 9000 GC Systems with a Thermal Conductivity Detector (TCD) Issue The TCD …
Agilent Community
Seahorse Analytics - the newest data analysis application for the Agilent Seahorse XF Analzyer Products. Seahorse XF Assay Learning Center - a learning center designed to introduce you …
Collection of 7000 and 7010 Triple Quadrupole GC/MS Resources
This collection of Agilent triple quadrupole (TQ) GC/MS resources includes l inks to user manuals, reference guides, application notes and videos for the 7000 Series Triple Quadrupole GC/MS …
Collection of 8890, 8860, 8850, Intuvo 9000, 990 ... - Agilent …
This is a collection of popular Agilent GC resources, including user manuals, application notes, troubleshooting information, tools, and supplies on Agilent.com. Go to Collection of GC/MS …
Setting up and Running the MassHunter Optimizer Tool
Oct 13, 2023 · This information applies to: Agilent 6400 Triple Quadrupole LC/MS systems, MassHunter Workstation 10.1 or earlier. Issue The MassHunter Optimizer tool allows users to …
