Search results for: open-tubular-columns-in-gas-chromatography

Open Tubular Columns in Gas Chromatography

Author : Leslie S. Ettre
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For my past sins, Leslie Ettre has given me the privilege of writing a few words to preface his excellent little book. It gives me great pleasure to do so, because of the many years of fruitful collabo ration we have had at Perkin-Elmer, because it is refreshing to see a treatise in gas chromatography in which the theoretical treatment has been bared to its essentials, without a mushrooming of formulae which, by means of an ever increasing number of parameters, account for more and more, and explain less and less, and because the author has recognized that the gas chromatographic column is a nearly passive element in its own right which deserves to have a treatise written nearly exclusively about it, just as electrical circuit theory can be discussed without elaborate references to vacuum tubes and meters. I wish this conscientiously written volume the success it deserves. M. J. E. GOLAY VII Preface Gas chromatography is a separation technique used primarily in analytical chemistry. Therefore, it is evident that special emphasis should be placed on that particular part of the apparatus in which the separation takes place. This part is the column, the heart of the gas chromatograph. The goal of researchers in the field of gas chromatography has been-from the beginning-to understand the separation process so that they might design columns with the best possible performance. Such investigation led M. J. E.

Open Tubular Column Gas Chromatography

Author : Milton L. Lee
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New York : Wiley, c1984.

Gas Chromatography with Glass Capillary Columns

Author : Walter Jennings
File Size : 85.67 MB
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Gas Chromatography with Glass Capillary Columns describes glass capillary technology and the selection, installation, evaluation, and use of glass open tubular columns for gas chromatography. Discussions are organized around the glass capillary column; column coating and installation; inlet systems; measurement of column efficiency; temperature programming and carrier flow; and retention behavior. Column selection and stability and sample preparation are also covered. This text is comprised of 13 chapters; the first of which introduces the reader to the practical considerations involved in the selection, installation, evaluation, and use of high-resolution open tubular glass capillary columns, along with the theory of the chromatographic process. The discussion then turns to the influence of operating parameters and storage conditions on the interrelated forces involved in coating glass capillary columns; the dynamic and static techniques of column coating; and design defects in the inlet system caused by excessive volume and dead space. The chapters that follow focus on general considerations in column attachment, measurement of column efficiency, and retention behavior of carrier gas, along with the operating temperature of the column, the choice of carrier gas, and carrier gas velocity. This book also looks at the factors that affect column stability, materials of restricted volatility, and some applications of glass capillary gas chromatography. This reference material is intended primarily for students and researchers interested in gas chromatography with glass capillary columns.

OPEN TUBULAR COLUMNS IN GAS CHROMATOGRAPHY

Author : LS. ETTRE
File Size : 49.20 MB
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Introduction to Open tubular Column Gas Chromatography

Author : John V. Hinshaw
File Size : 54.7 MB
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Open Tubular Columns in Gas Chromatography

Author : Leslie S Ettre
File Size : 64.35 MB
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Open Tubular Column Gas Chromatography in Environmental Sciences

Author : Francis Onuska
File Size : 52.56 MB
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Open Tubular Columns in Gas Chromatography

Author : Leslie S. Ettre
File Size : 27.43 MB
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The Preparation and Use of Glass Open Tubular Columns in Gas Chromatography

Author : D. S. Mottram
File Size : 86.33 MB
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Preparation and Evaluation of Open Tubular Columns for Gas Chromatography

Author : Agneta Bemgård
File Size : 89.58 MB
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Introduction to Open Tubular Column Gas Chromatography

Author : John V. Hinshaw
File Size : 38.46 MB
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Introduction to Open-Tubular Column Gas Chromatography presents the fundamentals of GC on open-tubular columns in a logical step-by-step manner suitable for students or professionals.

Open tubular columns in gas chromatography with a foreword by M J E Golay

Author : Leslie S. Ettre
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Open Tubular Columns in Gas Chromatography by L S Ettre With a Foreword by M J E Golay

Author : Leslie S. Ettre
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Stabilization of Glass Open Tubular Columns for Gas Chromatography

Author : Anita Louise Schneider Gordon
File Size : 86.66 MB
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Introduction to Open Tubular Columns

Author : Leslie S. Ettre
File Size : 21.39 MB
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Gas Chromatography with Open Tubular Columns in Parallel

Author : Romualdo L. R. Salcedo
File Size : 36.6 MB
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Static Headspace Gas Chromatography

Author : Bruno Kolb
File Size : 47.76 MB
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The only reference to provide both current and thorough coverage of this important analytical technique Static headspace-gas chromatography (HS-GC) is an indispensable technique for analyzing volatile organic compounds, enabling the analyst to assay a variety of sample matrices while avoiding the costly and time-consuming preparation involved with traditional GC. Static Headspace-Gas Chromatography: Theory and Practice has long been the only reference to provide in-depth coverage of this method of analysis. The Second Edition has been thoroughly updated to reflect the most recent developments and practices, and also includes coverage of solid-phase microextraction (SPME) and the purge-and-trap technique. Chapters cover: * Principles of static and dynamic headspace analysis, including the evolution of HS-GC methods and regulatory methods using static HS-GC * Basic theory of headspace analysis-physicochemical relationships, sensitivity, and the principles of multiple headspace extraction * HS-GC techniques-vials, cleaning, caps, sample volume, enrichment, and cryogenic techniques * Sample handling * Cryogenic HS-GC * Method development in HS-GC * Nonequilibrium static headspace analysis * Determination of physicochemical functions such as vapor pressures, activity coefficients, and more Comprehensive and focused, Static Headspace-Gas Chromatography, Second Edition provides an excellent resource to help the reader achieve optimal chromatographic results. Practical examples with original data help readers to master determinations in a wide variety of areas, such as forensic, environmental, pharmaceutical, and industrial applications.

Gas Chromatography with Open Tubular Columns in Parallel

Author : Romualdo L. R. Salcedo
File Size : 86.29 MB
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Quantitative Gas Chromatography for Laboratory Analyses and On Line Process Control

Author : G. Guiochon
File Size : 42.65 MB
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Here is an invaluable new book on quantitative gas chromatography which explains how the method can - or should - be used for accurate and precise analysis. Gas chromatography is firmly established as one of the few major methods for the quantitative analysis of complex mixtures. It is fast, accurate and inexpensive, with a broad range of applications. It has however become very complex and involved: over 200 stationary phases, more than 10 detector principles and several very different column types are available from among the catalogs of over 100 manufacturers and major retailers. The progressive changes in the nature of gas chromatography have created new needs for information which are not satisfied by the literature presently available. This book provides a complete discussion of all the problems involved in the achievement of quantitative analysis by gas chromatography, whether in the research laboratory, in the routine analysis laboratory or in process control. For this reason the presentation of theoretical concepts has been limited to the essential, while extensive explanations have been devoted to the various steps involved in the derivation of precise and accurate data. This starts with the selection of the instrumentation and column, continues with the choice of optimum experimental conditions, then calibration and ends with the use of correct procedures for data acquisition and calculations. Finally, there is almost always a way to reduce errors and an entire chapter deals with this single issue. Numerous relevant examples are presented. The first part of the book presents the theoretical background, simple enough to be understood by all analytical chemists, but still complete and up-to-date. It discusses the problems of flow dynamics, retention and band broadening. The changes in band profile associated with column overloading are explained without much recourse to mathematics. The second part describes the gas chromatograph and discusses the properties of each of its parts: gas flow and pressure controller sampling system, oven, column switching valves, detectors. The different implementations, their advantages and drawbacks are discussed and compared. In addition, three chapters present packed column technology, open tubular column technology and some sophisticated new phase systems, respectively. The new phase systems described use adsorbents, modified by coating or grafting organic phase, and carrier gases containing vapors which are sorbed by the stationary phase and modify it, such as steam. The third part discusses the applications in qualitative and quantitative analysis. Calibration, peak integration, sources of errors arising from the various parts of the instrument as well as from the measurement process itself are carefully described in four detailed chapters. Methods to carry out accurate and precise analysis are presented. A last chapter is devoted to process control analysis and gives a number of detailed examples of applications. A lexicon explaining the most important chromatographic terms and a detailed index complete the book. This is a book which no chemical analyst should be without. It should be on the library shelf of all universities, instrument companies and any laboratory and plant where gas chromatography is used.

Capillary Gas Chromatography

Author : David W. Grant
File Size : 29.93 MB
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Analytical techniques based on separation processes, such as chromatography and electrophoresis, are finding a growing range of applications in chemical, pharmaceutical and clinical laboratories. This series provides the analyst in these laboratories with well focused books covering individual techniques, so that they can be applied more efficiently and effectively to contemporary analytical problems. Capillary gas chromatography is one of the most powerful separation tools available to analysts working in a wide diversity of disciplines. Capillary Gas Chromatography will give practising analysts a sound theoretical and practical knowledge of the subject, giving a thorough account of the many fascinating and important developments occurring in the field in recent years. The theory is presented with practical applications in mind. Common problems encountered when using this technique, and the means of overcoming them are also presented. Capillary Gas Chromatography will be of great practical use to analytical chemists using the technique, including those in the pharmaceutical, food and beverage, environmental, clinical, and petrochemical industries. It will also be invaluable for graduate students and researchers involved in the need to separate complex mixtures.