Chromatographic Retention Indices

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Capillary Gas Chromatography in Essential Oil Analysis

Author : Pat Sandra
Publisher :
ISBN 13 :
Total Pages : 464 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Capillary Gas Chromatography in Essential Oil Analysis by : Pat Sandra

Download or read book Capillary Gas Chromatography in Essential Oil Analysis written by Pat Sandra and published by . This book was released on 1987 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to essential oil analysis. some aspects of essential oil preparation. considerations on the selection of cappilary columns for essential oil analysis. microtechniques in essential oil analysis. headscape versus classical analysis. Fingerprints in essential oil analysis. industrial quality control of essential oil by capillary GC. Retention indices in essential oil analysis. Possibilities and results of dual channel analysis of essential oils with fused silica capillaru columns. GC- mass specytrometry of essential oils: positive ion and negative ion and negative ion chemical ionazation techniques,computer matching techniques. Examples of artefact formation by chromatographic techniques. Possibilities, limitations, and future develpments in GC-FTIR analysis of essential oils. Possibilities of multidimensional GC in essential oils.

Chromatographic Retention Indices

Author : Věra Pacáková
Publisher : Ellis Horwood
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Chromatographic Retention Indices by : Věra Pacáková

Download or read book Chromatographic Retention Indices written by Věra Pacáková and published by Ellis Horwood. This book was released on 1992 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on the identification of substances on the basis of their retention, this volume pays particular attention to methods for attaining optimum conditions in order to obtain reliable values of retention times. It features tables which summarize over 1500 values of retention indices.

Qualitative Analysis of Flavor and Fragrance Volatiles by Glass Capillary Gas Chromatography

Author : Walter Jennings
Publisher : Elsevier
ISBN 13 : 0323141056
Total Pages : 481 pages
Book Rating : 4.3/5 (231 download)

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Book Synopsis Qualitative Analysis of Flavor and Fragrance Volatiles by Glass Capillary Gas Chromatography by : Walter Jennings

Download or read book Qualitative Analysis of Flavor and Fragrance Volatiles by Glass Capillary Gas Chromatography written by Walter Jennings and published by Elsevier. This book was released on 2012-12-02 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Quantitative Structure

Author : Roman Kaliszan
Publisher : Wiley-Interscience
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Quantitative Structure by : Roman Kaliszan

Download or read book Quantitative Structure written by Roman Kaliszan and published by Wiley-Interscience. This book was released on 1987-10-14 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of computers in numerical characterization of molecular structures has given chemists fundamentally new information on chemical structures, leading to major developments in physical, analytical, and medicinal chemistry. This book, written by a pioneer in the field, extends and updates research on quantitative structure retention relationships (QSRR) by consolidating and critically reviewing the extensive literature on the subject while providing basic theoretical and practical information required in all investigations involving chromatography, analytical chemistry, biochemistry, and pharmaceutical research. Coverage includes detailed discussions of the general theories and mechanisms of chromatographic separations, prediction of retention coefficients, statistical techniques and formal requirements of QSRR studies, specific applications of chromatographic data, and much more. Also provides several carefully selected figures and tables plus extensive bibliographies.

Retention and Selectivity in Liquid Chromatography

Author : R.M. Smith
Publisher : Elsevier
ISBN 13 : 0080858651
Total Pages : 479 pages
Book Rating : 4.0/5 (88 download)

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Book Synopsis Retention and Selectivity in Liquid Chromatography by : R.M. Smith

Download or read book Retention and Selectivity in Liquid Chromatography written by R.M. Smith and published by Elsevier. This book was released on 1995-01-13 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together a number of studies which examine the ways in which the retention and selectivity of separations in high-performance liquid chromatography are dependent on the chemical structure of the analytes and the properties of the stationary and mobile phases. Although previous authors have described the optimisation of separations by alteration of the mobile phase, little emphasis has previously been reported of the influence of the structure and properties of the analyte.The initial chapters describe methods based on retention index group increments and log P increments for the prediction of the retention of analytes and the ways in which these factors are influenced by mobile phases and intramolecular interactions. The values of a wide range of group increments in different eluents are tabulated.Different scales of retention indices in liquid chromatography are described for the comparison of separations, the identification of analytes and the comparison of stationary phases. Applications of these methods in the pharmaceutical, toxicology, forensic, metabolism, environmental, food and other fields are reviewed. The effects of different mobile phases on the selectivity of the retention indices are reported. A compilation of sources of reported retention index values are given.Methods for the comparison of stationary phases based on the interactions of different analytes are covered, including lipophilic and polar indices, shape selectivity comparisons, their application to novel stationary phases, and chemometric methods for column comparisons.

Metabolomics

Author : Wolfram Weckwerth
Publisher : Springer Science & Business Media
ISBN 13 : 1597452440
Total Pages : 290 pages
Book Rating : 4.5/5 (974 download)

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Book Synopsis Metabolomics by : Wolfram Weckwerth

Download or read book Metabolomics written by Wolfram Weckwerth and published by Springer Science & Business Media. This book was released on 2008-02-04 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metabolomics: Methods and Protocols examines the state-of-the-art in metabolomic analysis. Leading researchers in the field present protocols for the application of complementary analytical methods, such as gas chromatography-mass spectrometry (GC-MS). Metabolomics: Methods and Protocols contains forward-looking protocols, which provide the essential groundwork for future efforts in elucidating the structure of the unknowns detected in metabolomic studies.

Mass Spectra of Flavors and Fragrances of Natural and Synthetic Compounds

Author : Luigi Mondello
Publisher : John Wiley & Sons
ISBN 13 : 9781119069645
Total Pages : 0 pages
Book Rating : 4.0/5 (696 download)

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Book Synopsis Mass Spectra of Flavors and Fragrances of Natural and Synthetic Compounds by : Luigi Mondello

Download or read book Mass Spectra of Flavors and Fragrances of Natural and Synthetic Compounds written by Luigi Mondello and published by John Wiley & Sons. This book was released on 2015-03-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Component Identification in Complex Mixtures Essential oils are mixtures consisting of monoterpene andsesquiterpene hydrocarbons, their oxygenated derivatives, andaliphatic oxygenated compounds. The difficulties that arise in theGC-MS peak identification of these complex samples is due to thefact that many terpenes have identical mass spectra. This is aconsequence of similarities both in the initial molecule, or in thefragmentation patterns and rearrangements after ionization. Hence,MS identification of these compounds should always be accompaniedby retention time information that may support the MS librarysearch results. This innovative MS library for natural and synthetic products(essential oils, perfumes, etc.) makes the identification ofunknown compounds in complex mixtures easier, faster and morereliable. The use of chromatographic information, such as LinearRetention Index (LRI), can be used to filter MS results, enablingthe more reliable peak assignment of components in complexmixtures. Mass spectra, relative to standard and well-known simple matrixcomponents, were obtained and recorded through GC-MSseparation/identification. Furthermore, traditional informationrelative to each component (CAS number, common name, CAS name,molecular weight, compound formula, chemical class) plus linearretention index values are entered. Flavors and Fragrances of Natural and Synthetic Compounds,3rd edition contains >3000 mass spectra, LRI retentiondata, calculated Kovats RI, and searchable chemical structures ofcompounds of interest for the flavors and fragrances industry.Prepared by the Prof. Luigi Mondello under rigorous measurementconditions, the mass spectral library contains compounds central toflavor and fragrance research. What's on the disc: 1. FFNSC 3 in MS Search (Agilent, Bruker, Leco, JEOL, , Agilent .L(Chemstation, MassHunter), PerkinElmer Turbomass, Waters MassLynx,ACD ND9, and Cromatoplus 2. 30-Day trial version of Cromatoplus software

Chromatographic Methods in Metabolomics

Author : Tuulia Hyotylainen
Publisher : Royal Society of Chemistry
ISBN 13 : 1849737274
Total Pages : 259 pages
Book Rating : 4.8/5 (497 download)

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Book Synopsis Chromatographic Methods in Metabolomics by : Tuulia Hyotylainen

Download or read book Chromatographic Methods in Metabolomics written by Tuulia Hyotylainen and published by Royal Society of Chemistry. This book was released on 2013-09-06 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concept of a metabolic profile was introduced in 1971, when gas chromatography demonstrated a range of compounds present in human samples. Now termed metabolomics, the field is still emerging, and chromatography remains an essential tool for determining metabolites in a living system. This is the first book to present the chromatographic techniques used in metabolomics in a fundamental way. Sample preparation and quality control are described in detail, and all forms of chromatography applied to metabolomics are included. The editors present guidelines on selecting the most appropriate methodology, making the book an accessible guide to anyone entering the field. Handling data and applications are also described. This is an essential handbook for any laboratory looking to embark on a metabolomics research programme and includes the fundamentals of chromatography alongside the latest developments in the field.

Identification Techniques in Gas Chromatography

Author : D. A. Leathard
Publisher : John Wiley & Sons
ISBN 13 :
Total Pages : 300 pages
Book Rating : 4.:/5 (44 download)

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Book Synopsis Identification Techniques in Gas Chromatography by : D. A. Leathard

Download or read book Identification Techniques in Gas Chromatography written by D. A. Leathard and published by John Wiley & Sons. This book was released on 1970 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

HPLC

Author : Toshihiko Hanai
Publisher : Royal Society of Chemistry
ISBN 13 : 9780854045150
Total Pages : 152 pages
Book Rating : 4.0/5 (451 download)

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Book Synopsis HPLC by : Toshihiko Hanai

Download or read book HPLC written by Toshihiko Hanai and published by Royal Society of Chemistry. This book was released on 1999 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: How can these compounds be separated? Why was that method used? These are the two basic questions often asked by students of chromatography. HPLC: A Practical Guide provides the answers, enabling the reader to grasp the concepts of the technique using simple, representative chromatograms. Divided into six chapters, this practical guide covers basic concepts of HPLC; instrumentation; stationary phase materials; eluents; column efficiency; and the influence of physical chemistry on separations. Focusing on the basic considerations such as selection of stationary phase and eluent, rather than specific applications, sections on troubleshooting are also included. Uniquely, the descriptions of chromatographic separations are based on solubility using molecular properties, and solubility parameters are used to analyse the selections of chromatographic mode and column. Presenting the chemistry of liquid chromatography for undergraduate students, this valuable practical guide will also be useful for laboratory staff in industry and academia.

Identification of Essential Oil Components by Gas Chromatography/quadrupole Mass Spectroscopy

Author : Robert P. Adams
Publisher :
ISBN 13 :
Total Pages : 476 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Identification of Essential Oil Components by Gas Chromatography/quadrupole Mass Spectroscopy by : Robert P. Adams

Download or read book Identification of Essential Oil Components by Gas Chromatography/quadrupole Mass Spectroscopy written by Robert P. Adams and published by . This book was released on 2001 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Practical Gas Chromatography

Author : Katja Dettmer-Wilde
Publisher : Springer
ISBN 13 : 3642546404
Total Pages : 904 pages
Book Rating : 4.6/5 (425 download)

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Book Synopsis Practical Gas Chromatography by : Katja Dettmer-Wilde

Download or read book Practical Gas Chromatography written by Katja Dettmer-Wilde and published by Springer. This book was released on 2014-11-05 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Gas Chromatographic Retention Indices of Solvents and Other Volatile Substances for Use in Toxicological Analysis

Author : Rokus A. De Zeeuw
Publisher : Wiley-VCH Verlag GmbH
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (44 download)

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Book Synopsis Gas Chromatographic Retention Indices of Solvents and Other Volatile Substances for Use in Toxicological Analysis by : Rokus A. De Zeeuw

Download or read book Gas Chromatographic Retention Indices of Solvents and Other Volatile Substances for Use in Toxicological Analysis written by Rokus A. De Zeeuw and published by Wiley-VCH Verlag GmbH. This book was released on 1992 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modern Practice of Gas Chromatography

Author : Robert L. Grob, PhD
Publisher : John Wiley & Sons
ISBN 13 : 047165115X
Total Pages : 1059 pages
Book Rating : 4.4/5 (716 download)

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Book Synopsis Modern Practice of Gas Chromatography by : Robert L. Grob, PhD

Download or read book Modern Practice of Gas Chromatography written by Robert L. Grob, PhD and published by John Wiley & Sons. This book was released on 2004-08-04 with total page 1059 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bible of gas chromatography-offering everything the professional and the novice need to know about running, maintaining, and interpreting the results from GC Analytical chemists, technicians, and scientists in allied disciplines have come to regard Modern Practice of Gas Chomatography as the standard reference in gas chromatography. In addition to serving as an invaluable reference for the experienced practitioner, this bestselling work provides the beginner with a solid understanding of gas chromatographic theory and basic techniques. This new Fourth Edition incorporates the most recent developments in the field, including entirely new chapters on gas chromatography/mass spectrometry (GC/MS); optimization of separations and computer assistance; high speed or fast gas chromatography; mobile phase requirements: gas system requirements and sample preparation techniques; qualitative and quantitative analysis by GC; updated information on detectors; validation and QA/QC of chromatographic methods; and useful hints for good gas chromatography. As in previous editions, contributing authors have been chosen for their expertise and active participation in their respective areas. Modern Practice of Gas Chromatography, Fourth Edition presents a well-rounded and comprehensive overview of the current state of this important technology, providing a practical reference that will greatly appeal to both experienced chomatographers and novices.

Analytical Gas Chromatography

Author : Walter Jennings
Publisher : Elsevier
ISBN 13 : 0323141072
Total Pages : 270 pages
Book Rating : 4.3/5 (231 download)

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Book Synopsis Analytical Gas Chromatography by : Walter Jennings

Download or read book Analytical Gas Chromatography written by Walter Jennings and published by Elsevier. This book was released on 2012-12-02 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical Gas Chromatography is a free-standing introduction to and guide through the rapidly progressing field of analytical gas chromatography. The book is divided into 10 chapters that cover various aspects of analytical gas chromatography, from most advantageous column type to troubleshooting. The opening chapters of the book discuss the advantages of the open tubular column over the packed column. This topic is followed by significant chapters on various variables in the gas chromatographic process, including sample injection, stationary phase, carrier gas, and installation. The effect of changes in these variables on the solution elution order is also considered. A chapter also examines the influence of instrumental design features, such as excessive or unswept volumes in the flow path; suitability of the detection mode; and speed and fidelity of the data-handling equipment. The book also presents selected methods that have been employed to achieve better results for a given gas chromatographic problem. The application areas of gas chromatographic process, including food, flavor, fragrance, petroleum- and chemical-related, environment, biology, and medicine, are also presented. The concluding chapter addresses the basic troubleshooting knowledge and considers other chromatographic problems and methods for their rectification.

Pyrolysis - GC/MS Data Book of Synthetic Polymers

Author : Shin Tsuge
Publisher : Elsevier
ISBN 13 : 0444538933
Total Pages : 405 pages
Book Rating : 4.4/5 (445 download)

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Book Synopsis Pyrolysis - GC/MS Data Book of Synthetic Polymers by : Shin Tsuge

Download or read book Pyrolysis - GC/MS Data Book of Synthetic Polymers written by Shin Tsuge and published by Elsevier. This book was released on 2011-08-02 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this data book, both conventional Py-GC/MS where thermal energy alone is used to cause fragmentation of given polymeric materials and reactive Py-GC/MS in the presence of organic alkaline for condensation polymers are compiled. Before going into detailed presentation of the data, however, acquiring a firm grip on the proper understanding about the situation of Py-GC/MS would promote better utilization of the following pyrolysis data for various polymers samples. This book incorporates recent technological advances in analytical pyrolysis methods especially useful for the characterization of 163 typical synthetic polymers. The book briefly reviews the instrumentation available in advanced analytical pyrolysis, and offers guidance to perform effectually this technique combining with gas chromatography and mass spectrometry. Main contents are comprehensive sample pyrograms, thermograms, identification tables, and representative mass spectra (MS) of pyrolyzates for synthetic polymers. This edition also highlights thermally-assisted hydrolysis and methylation technique effectively applied to 33 basic condensation polymers. - Coverage of Py-GC/MS data of conventional pyrograms and thermograms of basic 163 kinds of synthetic polymers together with MS and retention index data for pyrolyzates, enabling a quick identification - Additional coverage of the pyrograms and their related data for 33 basic condensation polymers obtained by the thermally-assisted hydrolysis and methylation technique - All compiled data measured under the same experimental conditions for pyrolysis, gas chromatography and mass spectrometry to facilitate peak identification - Surveyable instant information on two facing pages dedicated to the whole data of a given polymer sample

Chemometrics in Chromatography

Author : Łukasz Komsta
Publisher : CRC Press
ISBN 13 : 1498772544
Total Pages : 506 pages
Book Rating : 4.4/5 (987 download)

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Book Synopsis Chemometrics in Chromatography by : Łukasz Komsta

Download or read book Chemometrics in Chromatography written by Łukasz Komsta and published by CRC Press. This book was released on 2018-02-02 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemometrics uses advanced mathematical and statistical algorithms to provide maximum chemical information by analyzing chemical data, and obtain knowledge of chemical systems. Chemometrics significantly extends the possibilities of chromatography and with the technological advances of the personal computer and continuous development of open-source software, many laboratories are interested in incorporating chemometrics into their chromatographic methods. This book is an up-to-date reference that presents the most important information about each area of chemometrics used in chromatography, demonstrating its effective use when applied to a chromatographic separation.