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 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 The Purification and Gas Chromatographic Analysis of Helium written by J. Malgiolio and published by . This book was released on 1961 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis for Impurities in Helium Using the Helium Ionization Detector written by Charles A. Seitz and published by . This book was released on 1985 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Improved Method and Apparatus for Analysis of Impurities in Helium written by David E. Emerson and published by . This book was released on 1970 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Information Circular written by and published by . This book was released on 1971 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analyses of Natural Gases of the United States written by and published by . This book was released on 1971 with total page 1034 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 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 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 Analysis of Trace Halocarbon Contaminants in Ultra High Purity Helium written by and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research and Development Reports written by and published by . This book was released on 1965 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1965 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Minerals Yearbook written by and published by . This book was released on 1961 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determining Trace Impurities in Grade A Helium written by C. G. Kirkland and published by . This book was released on 1960 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
