Author: Michael Oehme
Publisher: Wiley-VCH
ISBN: 9783527297481
Category : Science
Languages : en
Pages : 0
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Book Description
The basics of modern, compact GC-MS systems have barely changed during the last 20 years. Ion sources still become contaminated and have to be cleaned. Leaks occur and, as ever, the gas chromatograph is the most frequent source of troubles. A new and more worrisome trend, however, is that the manuals are becoming shorter and shorter. Unfortunately also the knowledge of the service staff seems to decrease. Experts with years of experience are increasingly difficult to find. This book aims to compensate this by giving answers to questions such as: How does my mass spectrometer work? What types of fault can show up and how do I detect them? How must separation and detection be adapted to each other? Which pitfalls can be avoided when elucidating structures and quantifying compounds? This book is intended to help newcomers from making their first steps into this rather complex technique to the development of highly demanding methods for trace analysis. Advanced users also will find much practical advice which will help to improve their work.
Author: O. David Sparkman
Publisher: Academic Press
ISBN: 0080920152
Category : Science
Languages : en
Pages : 633
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Book Description
The second edition of Gas Chromatography and Mass Spectrometry: A Practical Guide follows the highly successful first edition by F.G. Kitson, B.S. Larsen, and C.N. McEwen (1996), which was designed as an indispensible resource for GC/MS practitioners regardless of whether they are a novice or well experienced. The Fundamentals section has been extensively reworked from the original edition to give more depth of an understanding of the techniques and science involved with GC/MS. Even with this expansion, the original brevity and simple didactic style has been retained. Information on chromatographic peak deconvolution has been added along with a more in-depth understanding of the use of mass spectral databases in the identification of unknowns. Since the last edition, a number of advances in GC inlet systems and sample introduction techniques have occurred, and they are included in the new edition. Other updates include a discussion on fast GC and options for combining GC detectors with mass spectrometry. The section regarding GC Conditions, Derivatization, and Mass Spectral Interpretation of Specific Compound Types has the same number of compound types as the original edition, but the information in each section has been expanded to not only explain some of the spectra but to also explain why certain fragmentations take place. The number of Appendices has been increased from 12 to 17. The Appendix on Atomic Masses and Isotope Abundances has been expanded to provide tools to aid in determination of elemental composition from isotope peak intensity ratios. An appendix with examples on "Steps to follow in the determination of elemental compositions based on isotope peak intensities" has been added. Appendices on whether to use GC/MS or LC/MS, third-party software for use in data analysis, list of information required in reporting GC/MS data, X+1 and X+2 peak relative intensities based on the number of atoms of carbon in an ion, and list of available EI mass spectral databases have been added. Others such as the ones on derivatization, isotope peak patterns for ions with Cl and/or Br, terms used in GC and in mass spectrometry, and tips on setting up, maintaining and troubleshooting a GC/MS system have all been expanded and updated. Covers the practical instruction necessary for successful operation of GC/MS equipment Reviews the latest advances in instrumentation, ionization methods, and quantitation Includes troubleshooting techniques and a variety of additional information useful for the GC/MS practitioner A true benchtop reference A guide to a basic understanding of the components of a Gas Chromatograph-Mass Spectrometer (GC-MS) Quick References to data interpretation Ready source for information on new analyses
Author: Brian S. Middleditch
Publisher: Springer Science & Business Media
ISBN: 1461329825
Category : Science
Languages : en
Pages : 394
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Book Description
It has been estimated that more than 8090 of the world's scientists who have ever lived are still alive today. It would not be unreasonable to suggest that more than 95% of those who have ever used a mass spectrometer are not only alive but are still actively employed. Most have never had any formal training in the subject since, with a few notable exceptions, universities have only recently begun to offer courses in mass spectrometry. We have written this book for the student of modern mass spectro metry: it is for the novice who wished to know what the instruments can do and how the techniques can be applied. There are other books on the market which delve into the history of mass spectrometry and go deeply into the mathematical theory and instrumentation. There are yet more books which guide one through the art of interpreting spectra. We have deliberately avoided these topics so that the reader is confronted only with the basic principles and is allowed a taste of the applications. One of the best methods of deVeloping a useful textbook is to teach a course based upon its content. This is what we did. We met in Houston in 1976 to teach a course on "Perspectives in Mass Spectrometry" and to coordinate our writing. The authors of five of the chapters met again in St.
Author: Marvin C. McMaster
Publisher: Wiley-VCH
ISBN: 9780471248262
Category : Science
Languages : en
Pages : 184
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Book Description
A unique practical guide to building, using, and maintaining a complete GC/MS system. Though gas chromatography/mass spectrometry (GC/MS) is one of the most effective and popular methods of separating, identifying, and quantifying compounds in complex mixtures, there have been no comprehensive handbooks to date that clearly explain the setup and maintenance of a functional GC/MS system. Now Marvin and Christopher McMaster have created the hands-on resource that researchers and students need to get their own systems up and running quickly. Covering everything from necessary components to tuning, troubleshooting, and processing data, it allows even those with little prior knowledge of GC/MS to perform their own analyses and gather the data they require. GC/MS: A Practical User's Guide contains: * Full coverage of vital equipment, including the function, costs, and advantages of both desktop and floor-standing systems * A walkthrough of a basic GC/MS analysis and an examination of key methods of structural data interpretation * Extensive information on GC/MS system optimization * An exploration of the various research and environmental uses of GC/MS systems * An extended section on liquid chromatography/mass spectrometry to enhance comprehension of the gas method. For organic, analytical, clinical, environmental, and forensic chemists in all types of laboratories-and for students in all of these specialties -this book will be an invaluable companion for years to come.
Author: Hans-Joachim Hübschmann
Publisher: John Wiley & Sons
ISBN: 3527674330
Category : Science
Languages : en
Pages : 880
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Book Description
The only comprehensive reference on this popular and rapidly developing technique provides a detailed overview, ranging from fundamentals to applications, including a section on the evaluation of GC-MS analyses. As such, it covers all aspects, including the theory and principles, as well as a broad range of real-life examples taken from laboratories in environmental, food, pharmaceutical and clinical analysis. It also features a glossary of approximately 300 terms and a substance index that facilitates finding a specific application. For this new edition the work has been now extended to two volumes, reflecting the latest developments in the technique and related instrumentation, while also incorporating several new examples of applications in many fields. The first two editions were very well received, making this handbook a must-have in all analytical laboratories using GC-MS.
Author: Stéphane Bouchonnet
Publisher: CRC Press
ISBN: 1466572515
Category : Science
Languages : en
Pages : 231
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Book Description
Although GC-MS (gas chromatography–mass spectrometry) finds applications in fields as diverse as the food processing industry, medicine, pharmacology, and environmental analysis, the few works that are dedicated to this use of mass spectrometry are generally highly complex and theoretical. Emphasizing the practical aspects of GC-MS, without neglecting the fundamental theory, Introduction to GC-MS Coupling addresses both novice and experienced users of this technique. It presents GC-MS in a clear, instructive way and proposes solutions for the difficulties classically encountered by users. The book begins with the core principles of gas chromatography and its specific uses with MS detectors. It discusses generalities of mass spectrometry, including the various types of MS detectors and insight into the vacuum necessary for efficient operation. Chapters cover the types of analyzers used in GC-MS and their functioning principles, with a focus on the commonly used quadrupolar analyzers, as well as the implementation, advantages, and limits of various modes of acquisition in GC-MS. The text also compares performance and limitations of quadrupolar analyzers. The author includes a full chapter on quantification using GC-MS, a topic that can be puzzling for many chemists. Encouraging a critical approach to databases, he compares laboratory-made and commercial mass spectra databases, and describes a database research algorithm. The final chapter examines mass spectra interpretation, covering chemistry concepts such as inductive and mesomeric effects required to understand dissociation pathways, and presents a global strategy for mass spectra interpretation.
Author: Wilfried M.A. Niessen
Publisher: CRC Press
ISBN: 9781420029512
Category : Science
Languages : en
Pages : 530
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Book Description
This volume details the principles and instrumentation of gas chromatography-mass spectrometry (CG-MS), and outlines industrial, environmental, pharmaceutical, clinical, toxicological, forensic and food-related applications, revealing findings from the laboratories of 40 contributing scientists around the world using GC-MS in practice. It describes upstream and downstream applications of GC-MS in the petroleum industry and identifies chlorinated compounds in the environment with quadrupole ion-trap technology and high-resolution sector instruments.
Author: F.W. Karasek
Publisher: Elsevier
ISBN: 0080929060
Category : Science
Languages : en
Pages : 210
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Book Description
The book begins by covering the basic principles of both gas chromatography (GC) and mass spectrometry (MS) to the extent necessary to understand and deal with the data generated in a GC-MS analysis. The focus then turns to the particular requirements created by a direct combination of these two techniques into a single instrumentation system. The data generated and their use are covered in detail. The role of the computer and its specific software receives special attention, especially in the matter of compound identification via mass spectral search techniques. GC-MS-computer instrumentation has reached such a plateau of excellence today that the present commercial systems will not be obsolete for a long time to come. Therefore, a detailed description of these systems is not only informative but is also pertinent to the subject matter of this book. Finally, representative applications and results obtained with GC-MS-computer techniques are presented and chosen in such a way as to permit extrapolation of specific applications to similar problems encountered by the reader. To aid the reader in mastering the subject matter and increase understanding, interpretation problems and suggested readings are included. The format is instructional, informative and application-oriented with material presented in such a way as to be useful to a broad spectrum of people.The book serves as a text in its own right.The software package Gas Chromatography-Mass Spectrometry: A Knowledge Base, by F.A. Settle, Jr. and M.A. Pleva provides rapid access to a wealth of current information in the GC-MS field. Its three diskettes (51/4 inch) allow the user three ways to access: the index mode, the tree mode and a keyword search mode. The package may be purchased separately and is available for the IBM-PC and compatibles.The software provides a valuable supplement to the book.
Author: McMaster M.
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Harold M. McNair
Publisher: John Wiley & Sons
ISBN: 1119450756
Category : Science
Languages : en
Pages : 293
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Book Description
Basic Gas Chromatography, Third Edition provides a brief introduction to GC following the objectives for titles in this series. It should appeal to readers with varying levels of education and emphasizes a practical, applied approach to the subject. : This book provides a quick need-to-know introduction to gas chromatography; still the most widely used instrumental analysis technique, and is intended to assist new users in gaining understanding quickly and as a quick reference for experienced users. The new edition provides updated chapters that reflect changes in technology and methodology, especially sample preparation, detectors and multidimensional chromatography. The book also covers new detectors recently introduced and sample preparation methods that have become much more easily accessible since the previous edition.
