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Author: Walter Jennings
Publisher: CRC Press
ISBN: 9780824712235
Category : Science
Languages : en
Pages : 644
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Book Description
Author: Walter Jennings
Publisher: CRC Press
ISBN: 9780824712235
Category : Science
Languages : en
Pages : 644
Get Book Here
Book Description
Author: Jennings WG.
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Walter Jennings
Publisher: Elsevier
ISBN: 0323141064
Category : Science
Languages : en
Pages : 193
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Book Description
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.
Author: T. Takagi
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
Author: Walter Jennings
Publisher: Elsevier
ISBN: 0323141056
Category : Technology & Engineering
Languages : en
Pages : 481
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Book Description
Qualitative Analysis of Flavor and Fragrance Volatiles by Glass Capillary Gas Chromatography deals with the application of glass capillary gas chromatography to qualitative analysis of flavor and fragrance volatiles. Topics range from gas chromatographic system requirements and retention indices to selective detectors, ancillary reactions, and gas chromatography-mass spectrometry. This text is comprised of six chapters; the first of which provides an overview of the use of glass capillary gas chromatography in qualitative analysis of flavor and fragrance volatiles. The discussion then turns to gas chromatographic system requirements with respect to columns, inlets, detectors, and temperature control. The reader is also introduced to the Kovats retention index system, which utilizes a logarithmic scale to describe the retention behavior of a compound relative to that of the n-paraffin hydrocarbons. The use of selective detectors, such as thermal conductivity, flame ionization, nitrogen-phosphorus, electron capture, and photoionization detectors in qualitative analysis, is also considered. The final two chapters focus on ancillary reactions in glass capillary gas chromatography and general considerations in gas chromatography-mass spectrometry, including interfacing. This book is intended primarily for researchers involved in studies of the volatile constituents of fragrances, food, and natural products.
Author: Anita Marie Thompson
Publisher:
ISBN:
Category : Chemistry, Analytic
Languages : en
Pages : 340
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Book Description
Author: Michael H. Gordon
Publisher: Springer Science & Business Media
ISBN: 1461306817
Category : Science
Languages : en
Pages : 371
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Book Description
The food analyst plays an important role in modern society. Stricter control over additives in food and concern about the effects of contamination of food by industrial and agricultural chemicals are among the developments which are leading to an increasing emphasis on detailed and accurate analysis of food. However. analysis of food is required for many reasons, including detection of toxic components, monitoring legislation, detecting adulteration, formulation of controlled diets, controlling formulation during product development and detecting changes in food during storage and processing. Foods comprise a complex mixture of components and food analysis requires efficient methods of separation with high sensitivity or specificity of detection. Although many food components are involatile or thermally labile and therefore not suitable for analysis by gas chromatography, other components are volatile and this technique is the preferred analytical method. Developments in methods of derivati zation, injector design and column technology have also extended the applicability of gas chromatography to the analysis of relatively involatile compounds.
Author: Wolfgang Bertsch
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 614
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Author: R. Wittkowski
Publisher: CRC Press
ISBN: 1000159957
Category : Science
Languages : en
Pages : 418
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Book Description
This book offers a comprehensive survey on the possibilities, applications, and new developments of capillary gas chromatography for the complete range of examinations of food and raw material. It is intended for food scientists/chemists, food technologists, and nutritionists.
Author: Kurt Grob
Publisher:
ISBN:
Category : Capillarity
Languages : en
Pages : 256
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Book Description
