Download or read book Gas chromatographic Analysis of Trace Impurities written by Viktor Grigorʹevich Berezkin and published by . This book was released on 1973 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas-chromatographic separation in impurity analysis. Use of large samples in impurity analysis. Gas-chromatographic detectors. Use of selective sorbents and selective detectors. Nonisothermal methods in impurity analysis. Reactive analytical gas chromatography. Accumulation methods. Some aspects of quantitative analysis. Basic methods of preparing standard mixtures.
Download or read book Gas Chromatographic Analysis of Trace Impurities written by V G Berezkin and published by Springer. This book was released on 2014-08-15 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Chromatographic Analysis of Trace Impurities written by V. G. Berezkin and published by Springer. This book was released on 2013-05-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent scientific and industrial developments have demon strated the major effects (advantageous or otherwise) of trace components in compounds, which in commercial products may substantially affect the properties and the course of reactions, especially catalytic ones. Some of these problems (e.g., the pur ity of natural waters and air) have attracted the attention not only of specialists but also of society generally. It would be impossible to do research on trace components and contaminants if we did not have reliable rapid and sensitive methods of determining substances present in mixtures in minute concentrations. Gas chromatography is an effective method of purity testing. This book deals with analysis for trace components, together with the basic methods of gas chromatography that are used for the purpose. We have tried to reflect here the principal papers in this area appearing in the foreign literature and in Rus sian. Weare indebted to Plenum Pre~'B for the opportunity of pre senting this edition. Moscow September 1972 v Preface Gas -chromatographic analysis for impurities is presently a rapidly developing area in gas chromatography, because many practical topics give considerable importance to impurity analy sis. Progress in this analysis bas been such for volatile com pounds (and also for nonvolatile ones, when reactive gas chroma tography is used) that one can now be confident of solving most practical problems in this way. Commercial ionization detectors of high sensitivity and selectivity often allow one to detect impuri ties down to levels of parts in 109.
Download or read book Gas Chromatographic Trace analysis of Impurities in Highly Pure Arsine Phosphine Or Silane Mixtures Used in Microelectronics written by W. Ecknig and published by . This book was released on 1985 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trace Analysis of Specialty and Electronic Gases written by William M. Geiger and published by John Wiley & Sons. This book was released on 2013-07-15 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the latest advances and applications of specialty and electronic gas analysis The semiconductor industry depends upon a broad range of instrumental techniques in order to detect and analyze impurities that may be present in specialty and electronic gases, including permanent gases, water vapor, reaction by-products, and metal species. Trace Analysis of Specialty and Electronic Gases draws together all the latest advances in analytical chemistry, providing researchers with both the theory and the operating principles of the full spectrum of instrumental techniques available for specialty and electronic gas analysis. Moreover, the book details the advantages and disadvantages of each technique, steering readers away from common pitfalls. Featuring contributions from leading analytical and industrial chemists, Trace Analysis of Specialty and Electronic Gases covers a wide range of practical industrial applications. The book begins with the historical development of gas analysis and then focuses on particular subjects or techniques such as: Metals sampling and ICP-MS analysis Improvements in FTIR spectroscopy Water vapor analysis techniques New infrared laser absorption spectroscopy approaches GC/MS, GC/AED, and GC-ICP-MS techniques Gas chromatography columns Atmospheric pressure ionization mass spectrometry Lastly, the book examines gas mixtures and standards that are critical for instrument calibration. There are also two appendices offering information on fittings and material compatibility. With its thorough review of the literature and step-by-step guidance, Trace Analysis of Specialty and Electronic Gases enables researchers to take full advantage of the latest advances in gas analysis. Although the book's focus is the semiconductor and electronics industry, analytical chemists in other industries facing challenges with such issues as detection selectivity and sensitivity, matrix gas interference, and materials compatibility will also discover plenty of useful analytical approaches and techniques.
Download or read book Analytical Reaction Gas Chromatography written by Viktor G. Berezkin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most universal and effective method for the analysis of complex multicomponent mixtures of volatile substances is gas chromatography. However, there are a number of limitations asso ciated with the classical variation of this technique which retard its development and the further expansion of its application: 1) the identification of the components of a complex mix ture of unknown composition is in itself a complex and difficult problem, unless the homologous series of the component to be identified is known; 2) the overlapping of chromatographic peaks for several compounds makes it difficult, and in a number of cases impossible, to carry out qualitative and quantitative analysis of these components, and leads to the necessity of using several columns of different polarities or to the use of columns with very high efficiency; 3) the direct analysis of unstable and nonvolatile compounds is impossible; 4) the difficulty of quantitative chromatographic analysis using thermal conductivity detectors increases with the necessity of determining individual response (calibration) factors; the insensitivity of the flame ionization detector to a number of substances (inorganic gases) leads to the necessity of introducing additional operations (prelimi nary concentration of trace components) in connection with thermal conductivity detectors. vii viii FOREWORD The directed use of chemical conversion of the compounds analyzed usually makes it possible to remove the limitations cited above.
Download or read book Determination of Trace Hydrocarbon Impurities in High Purity Chemicals from Petroleum by Gas Chromatography written by R. A. Klett and published by . This book was released on 1965 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas chromatography, using packed columns and hydrogen flame-ionization detection, is used to identify and determine trace impurities in many high purity petrochemicals, such as benzene, cyclohexane, methyl cyclohexane, toluene, ethylbenzene, isopropylbenzene, styrene, -methylstyrene and propylene. Impurities in concentrations as low as 0.5 ppm may be detected. Using reproducible and equal volume injections, quantitative results are determined by comparing the detector response obtained for known levels of some impurity in a properly prepared standard blend with the detector response obtained for the impurities in a comparable sample.
Download or read book Industrial Gas Chromatographic Trace Analysis written by Horst Hachenberg and published by John Wiley & Sons. This book was released on 1973 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chromatographic Analysis of Helium Containing Trace Impurities written by Donald William Shannon and published by . This book was released on 1964 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Chromatography in Air Pollution Analysis written by V.G. Berezkin and published by Elsevier. This book was released on 1991-04-25 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air pollution determination is one of the most important fields of gas chromatography application in practice. This book provides a systematic description of the main stages of air pollution determination, ranging from sampling problems to the quantitative estimation of the acquired data. Special attention is paid to the problem of gas, vapor, spray and solid particles extraction from air. The main methods of sampling procedure, namely, container utilization, cryogenic concentration, absorption, adsorption, chemisorption and filter usage, and successive impurities extraction are also handled. Sorption theory and the problems of sorption and desorption efficiency for hazardous impurities being extracted from traps with sorbents are discussed in detail. The practical utilization of different sorbents (silica, activated carbon, polymers etc.) to carry out sampling procedures for 200 main pollutants with known TLV (USSR and USA) is also considered. This highly informative book, reflecting several insufficiently known techniques as well as the experience of both western and Soviet researchers, should be of interest to both beginners and skilled researchers.
Download or read book The Analysis of Gases by Chromatography written by C. J. Cowper and published by Elsevier. This book was released on 2013-10-22 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intended to enable trained scientists to equip themselves to successfully perform analyses of complex gas mixtures. The equipment and the considerations governing the choice of carrier gas are described in detail. Selection of methods for use on complex mixtures often involves the choice of more than one column; the separating capabilities of column packing and how they can be used in combinations are described and numerous examples are given. The handling of samples prior to separation and the calculation of results after separation, including calibration, are described. Throughout, special emphasis is given to the differences between gas analysis and the better documented liquid analysis.
Download or read book A Practical Guide to Gas Analysis by Gas Chromatography written by John Swinley and published by Elsevier. This book was released on 2019-06-28 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Practical Gas Analysis by Gas Chromatography provides a detailed overview of the most important aspects of gas analysis by gas chromatography (GC) for both the novice and expert. Authors John Swinley and Piet de Coning provide the necessary information on the selection of columns and components, thus allowing the reader to assemble custom gas analysis systems for specific needs. The book brings together a wide range of disparate literature on this technique that will fill a crucial gap for those who perform different types of research, including lab operators, separation scientists, graduate students and academic researchers. This highly practical, up-to-date reference can be consulted in the lab to guide key decisions about proper setup, hardware and software selection, calibration, analysis, and more, allowing researchers to avoid the common pitfalls caused by incorrect infrastructure. Shows, in detail, how valve configurations work, allowing readers to understand the building blocks of extremely complex systems Presents the complete infrastructure for setting up a gas analysis laboratory in a single source Includes a full chapter on practical analytical systems for analyzing various gas mixtures
Download or read book Gas Chromatography of Polymers written by and published by Elsevier. This book was released on 2011-09-22 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas Chromatography of Polymers
Download or read book Standard Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography written by and published by . This book was released on 1998 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Concentration of High Boiling Impurities from Low Boiling Compounds by Reverese Flow Gas Chromatography written by Amos S. Newton and published by . This book was released on 1971 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characteristics of gas chromatography peaks arising from various compounds when the column flow is reversed has been studied. It is shown that all compounds are eluted after reversal of the flow with the peak maximum at a time equal to or less than the time of flow reversal. The half width of the reverse peak is determined by a constant related to the number of plates in the column, and the square root of twice the time of flow reversal multiplied by the square root of the time of emergence of the compound when run in the forward direction. The method appears applicable to the concentration of trace high boiling impurities in any matrix in which the bulk components can be rapidly eluted through a suitable column.
Download or read book Trace Organic Impurities in Gaseous Helium written by Thomas A. Schehl and published by . This book was released on 1973 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: A program to determine trace organic impurities present in helium has been initiated. The impurities were concentrated in a cryogenic trap to permit detection and identification by a gas chromatographic-mass spectrometric technique. Gaseous helium (GHe) exhibited 63 GC flame ionization response peaks. Relative GC peak heights and identifications of 25 major impurities by their mass spectra are given. As an aid to further investigation, identities are proposed for 16 other components, and their mass spectra are given.
Download or read book Gas Chromatographic Techniques and Applications written by Alan John Handley and published by Taylor & Francis. This book was released on 2001 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides an overview of the state of the art in gas chromatography with an emphasis on new technologies. The authors-all drawn from respected industrial and academic laboratories-consider developments in gas chromatographic techniques over the last decade. Application areas are addressed within individual chapters.
