Download or read book Part I A Thermodynamic Study of Acetonitrile Water Mixtures in Reversed Phase Liquid Chromatography Part II A Gas Chromatographic Study of the Effect of Temperature and Column Pressure on Solute Retention on a Bonded Phase Using Helium and Carbon Dioxide as Mobile Phases written by Aurelio Alvarez-Zepeda and published by . This book was released on 1991 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ACS Directory of Graduate Research 1993 written by American Chemical Society. Committee on Professional Training and published by . This book was released on 1993 with total page 1700 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1992 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Programmed Introduction to Gas liquid Chromatography written by James Bulmer Pattison and published by . This book was released on 1969 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: With many questions and feedback to the answers.

Download or read book Liquid Chromatography written by M.C. García-Álvarez-Coque and published by Elsevier Inc. Chapters. This book was released on 2013-01-08 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The addition of reagents to an RPLC mobile phase enables the separation of ionizable compounds, inorganic anions, and metal ions using conventional instrumentation, silica-based materials, and hydro-organic mixtures, thanks to a variety of secondary equilibria. This gives rise to several chromatographic modes, whose main features are outlined in this chapter. The effect of the mobile phase pH on the retention of ionizable compounds is described, together with the recommended experimental practice. The mechanism of adsorption of amphiphilic anions or cations on the stationary phase to attract analytes with opposite charge or suppress the silanol activity is discussed. Different reagents, such as alkylammonium salts, surfactants (below and above the critical micelle concentration), perfluorinated carboxylate anions, chaotropic ions, and ionic liquids, are considered. The potential of metal chelation for the determination of metal ions and organic compounds is also summarized.

Download or read book Instrumental Liquid Chromatography written by and published by Elsevier. This book was released on 2011-09-22 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instrumental Liquid Chromatography

Download or read book Reversed Phase High Performance Liquid Chromatography written by Ante M. Krstulovic and published by . This book was released on 1982-05-04 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive problem-solving approach to reversed-phase high-performance liquid chromatography covering the theoretical aspects and practical information needed in diverse areas of research. Also reviews RPLC applications in the biomedical/biochemical field.

Download or read book Introduction to High Performance Liquid Chromatography written by Richard John Hamilton and published by . This book was released on 1978 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamental Studies of Capillary Columns in Liquid Chromatography written by Christine Esther Evans and published by . This book was released on 1990 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ion pair Chromatography written by Milton T. W. Hearn and published by . This book was released on 1985 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Thermodynamic and Kinetic Characterization of Solute Transfer in Reverse phase Liquid Chromatography written by Samuel Barnett Howerton and published by . This book was released on 2003 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Liquid Chromatography written by A. Felinger and published by Elsevier Inc. Chapters. This book was released on 2013-01-08 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kinetic theories of liquid chromatography play a key role in evaluating the performance of stationary phases. The conventionally used plate-height equations and the band broadening occurring in different areas of liquid chromatography are accounted for by kinetic models. In this chapter, the most important macroscopic (lumped-kinetic, lumped-pore, and general-rate) and microscopic (stochastic–dispersive) models are discussed. The plate-height equations arising from those kinetic models are discussed and compared.

Download or read book Introduction to Modern Liquid Chromatography written by Lloyd R. Snyder and published by John Wiley & Sons. This book was released on 2011-09-20 with total page 831 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest edition of the authoritative reference to HPLC High-performance liquid chromatography (HPLC) is today the leading technique for chemical analysis and related applications, with an ability to separate, analyze, and/or purify virtually any sample. Snyder and Kirkland's Introduction to Modern Liquid Chromatography has long represented the premier reference to HPLC. This Third Edition, with John Dolan as added coauthor, addresses important improvements in columns and equipment, as well as major advances in our understanding of HPLC separation, our ability to solve problems that were troublesome in the past, and the application of HPLC for new kinds of samples. This carefully considered Third Edition maintains the strengths of the previous edition while significantly modifying its organization in light of recent research and experience. The text begins by introducing the reader to HPLC, its use in relation to other modern separation techniques, and its history, then leads into such specific topics as: The basis of HPLC separation and the general effects of different experimental conditions Equipment and detection The column—the "heart" of the HPLC system Reversed-phase separation, normal-phase chromatography, gradient elution, two-dimensional separation, and other techniques Computer simulation, qualitative and quantitative analysis, and method validation and quality control The separation of large molecules, including both biological and synthetic polymers Chiral separations, preparative separations, and sample preparation Systematic development of HPLC separations—new to this edition Troubleshooting tricks, techniques, and case studies for both equipment and chromatograms Designed to fulfill the needs of the full range of HPLC users, from novices to experts, Introduction to Modern Liquid Chromatography, Third Edition offers the most up-to-date, comprehensive, and accessible survey of HPLC methods and applications available.

Download or read book Applications of Hydrophilic Interation Chromatography in the Analysis of Drugs and Metabolites written by Saud Bawazeer and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrophilic interaction liquid chromatography (HILIC) has grown in popularity during the last ten years. It is somewhere between normal phase and reverse phase liquid chromatography in terms of its mode of action. HILIC involves the separation of polar analytes through their partitioning into a water rich layer that is formed on the surface of the stationary phase. However, there are also additional mechanisms involved in HILIC including ion exchange interactions. There are an increasing number of HILIC columns on the market. A number of different factors can be set to control the separation of compounds in HILIC mode including column temperature, mobile phase composition, pH and buffer type and concentration. In the current study a cyanopropyl (CN) HPLC column was used for the separation of some basic compounds in HILIC mode. Good separation of a test mix of basic compounds was obtained with a mobile phase consisting of acetonitrile/water (95:5) containing 3.25mM ammonium acetate. The retention times of the basic compounds decreased with increased ionic strength or with increased water content in the mobile phase. The effect of the size of the basic centre, pH, and buffer concentration was also studied using a series of model bases. The utility of the column for impurity profiling of two basic drugs was tested. The CN column showed reasonable stability although there appeared to be loss of stationary phase with time. The retention properties of a silica gel column and a type C silica (silicon hydride) column for bases, sugars and polar acids were compared in HILIC mode with formic acid or ammonium acetate as aqueous phase modifiers. Seven different HILIC stationary phases were characterised with regard to their retention properties for 100 metabolite standards. In addition three of these phases were evaluated with regard to their ability to profile metabolites in urine. Finally a HILIC method was developed in order to determine the level of nicotine exposure in companion animals resulting from passive smoking.

Download or read book High Performance Liquid Chromatography Ion Chromatography Thin Layer and Column Chromatography of Water Samples 1983 written by and published by . This book was released on 1984 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chromatography and Separation Science written by Satinder Ahuja and published by Elsevier. This book was released on 2003-01-11 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: The basic objectives of this book are to: provide basic information on chromatography and separation science; show how simple extraction and partition processes provide the basis for development of chromatography and separation science; describe the role of chromatography and separation science in various fields; discuss the role of chromatography and separation science in development of new methodology; and present new evolving methods and how to select an optimum method.· The book covers the fundamental physical and chemical phenomena involved in separations· Provides a concise overview of the basics of transport phenomena and thermodynamics· Shows the importance of chromatography within separation science