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The Characterization Of Bonded Phases For High Performance Liquid Chromatography
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Book Synopsis The Characterization of Bonded Phases for High Performance Liquid Chromatography by : Klaus John Stetzenbach
Download or read book The Characterization of Bonded Phases for High Performance Liquid Chromatography written by Klaus John Stetzenbach and published by . This book was released on 1980 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis and Characterization of Bonded Stationary Phases in High Performance Liquid Chromatography by : Steven Douglas Fazio
Download or read book The Synthesis and Characterization of Bonded Stationary Phases in High Performance Liquid Chromatography written by Steven Douglas Fazio and published by . This book was released on 1985 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-Performance Liquid Chromatography by : Csaba Horváth
Download or read book High-Performance Liquid Chromatography written by Csaba Horváth and published by Elsevier. This book was released on 2013-10-22 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-Performance Liquid Chromatography: Advances and Perspectives, Volume 1 deals with the fundamental aspects of high-performance liquid chromatography, a technique used in chemical analysis. The publication provides accounts, presented by experts in the field, of a variety of topics in high-performance liquid chromatography. Each chapter covers interesting subjects such as the evolution of liquid chromatography; the use of bonded phases in high-performance chromatography; effects of ionization and complex formation on retention and selectivity in reversed-phase chromatography; and gradient elution. Chromatographers, chemists, and researchers in the field of chemical analysis will find this book a valuable reference material.
Book Synopsis The Characterization of Normal Bonded Phase High Performance Liquid Chromatography Columns by : Patty L. Smith
Download or read book The Characterization of Normal Bonded Phase High Performance Liquid Chromatography Columns written by Patty L. Smith and published by . This book was released on 1987 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis THE CHARACTERIZATION OF BONDED PHASES FOR HIGH PERFORMANCE LIQUID CHROMATOGRAPHY by :
Download or read book THE CHARACTERIZATION OF BONDED PHASES FOR HIGH PERFORMANCE LIQUID CHROMATOGRAPHY written by and published by . This book was released on 1980 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physical and chemical nature of chemically bonded phases used in high performance liquid chromatography have been studied. These bonded phases were characterized by a variety of chromotographic and non-chromatographic experiments. The non-chromatographic techniques included 13C NMR and batch extraction methods. The role played by the bonded phase as well as the mobile phase in determining the retention characteristics of the "stationary phase" were determined. The retention of solute molecules on bonded phases was found to be a function of the chain length of the bonded phase, the chemical nature of the bonded molecule, and the type of organic modifier used in the mobile phase. The energetics of the solute-stationary phase interactions was determined by the differential enthalpy and was found to be indicative of a partitioning process between two liquid phases. The retention process was also affected by the surface coverage of the bonded molecule. Optimum retention and separation characteristics were obtained with a hydrocarbon bonded phase of high surface coverage when used with a mobile phase containing a very polar organic modifier. The efficiency of these bonded phases was found to be independent of chain length as well as surface coverage of the bonded molecule. Some bonded phases which have specific functionalities incorporated into the bonded molecule are not true reversed phases. The selectivity of the bonded phases towards polar solute molecules was found to be affected by the type of organic modifier used in the mobile phase. The major accomplishment of this work shows that the stationary phase consists of the bonded molecule as well as trapped mobile phase. The composition of this ternary mixture is a function of the type and amount of bonded material and the type and amount of organic modifier used in the mobile phase
Book Synopsis The Synthesis and Characterization of Bonded Zwitterionic Stationary Phases for High Performance Liquid Chromatography by : Louis W. Yu
Download or read book The Synthesis and Characterization of Bonded Zwitterionic Stationary Phases for High Performance Liquid Chromatography written by Louis W. Yu and published by . This book was released on 1987 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Performance Liquid Chromatography by : Mary T. Gilbert
Download or read book High Performance Liquid Chromatography written by Mary T. Gilbert and published by Elsevier. This book was released on 2013-10-22 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Performance Liquid Chromatography focuses on the developments, operating techniques, practices, equipment, and packing materials involved in High Performance Liquid Chromatography (HPLC). The book first offers information on basic chromatographic theory, equipment, and the column. Topics include resolution, efficiency, pumps and gradient systems, connectors, detectors, injectors, column packing and testing, packing materials, and coupling of columns. The text also ponders on sample treatment and separation methods, as well as trace analysis, reversed phase chromatography, and selection/optimization conditions. The publication examines adjustment of selectivity by the use of eluent additives and preparative liquid chromatography. Discussions focus on chromatography on dynamically modified oxide gels, metal complexation, crown ethers, ion pair chromatography, materials for preparative chromatography, and separation strategy. The text also reviews the trends in the practice of HPLC and chiral chromatography. The book is a dependable reference for readers interested in High Performance Liquid Chromatography.
Book Synopsis High Performance Liquid Chromatography by : W.J. Lough
Download or read book High Performance Liquid Chromatography written by W.J. Lough and published by CRC Press. This book was released on 1995-09-30 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: High performance liquid chromatography (HPLC) has long been recognized as one of the most useful and versatile analytical techniques. It has now progressed from being a highly expensive method of analysis to a routine technique with wide applications. Consequently there is a requirement in many chemistry and chemistry-related courses for students to acquire a detailed understanding of the principles and practice of HPLC. Written in a manner suitable for undergraduate students studying analytical chemistry and learning about chromatographic analytical techniques applied to pharmaceutical analysis, biochemistry and related disciplines, High-performance Liquid Chromatography: Fundamental Principles and Practice introduces the fundamentals of HPLC. Loosely structured in three parts, the text begins with a thorough introduction of the subject and then progresses through the essential knowledge of the instrumentation needed for HPLC. The final part covers with the applications of HPLC in real-world situations. Developed by a team of international experts from a wide cross-section of disciplines, the text is relevant to a wide range of courses.
Book Synopsis The Synthesis and Characterization of Bonded Liquid Crystal Stationary Phases for Use in High Performance Liquid Chromatography by : Mark Allen Vidensek
Download or read book The Synthesis and Characterization of Bonded Liquid Crystal Stationary Phases for Use in High Performance Liquid Chromatography written by Mark Allen Vidensek and published by . This book was released on 1990 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation and Characterization of Well-defined Chemically Bonded Stationary Phases for High Pressure Liquid Chromatography by : Gerrit Engbertus Berendsen
Download or read book Preparation and Characterization of Well-defined Chemically Bonded Stationary Phases for High Pressure Liquid Chromatography written by Gerrit Engbertus Berendsen and published by . This book was released on 1980 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation and Characterization of Diphenylphosphine Bonded Phase Packings for High Performance Liquid Chromatography by : Tyra L. Montgomery
Download or read book Preparation and Characterization of Diphenylphosphine Bonded Phase Packings for High Performance Liquid Chromatography written by Tyra L. Montgomery and published by . This book was released on 1984 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to high performance liquid chromatography by : R. Hamilton
Download or read book Introduction to high performance liquid chromatography written by R. Hamilton and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first edition of this book the major advances have been in column packings, where over ninety per cent of separations are now performed using chemically bonded microparticulate packings, and in instrumentation. The use of microprocessor control has brought about a rationalization of mobile phase delivery systems and in detectors, the introduction of electrochemical and spectrophotometric detection other than in the ultra-violet region, has widened the field of applications and the sensitivity of the technique. The use of ion pair chromatography has increased at the expense of ion-exchange and this together with the improvements in detectors has greatly increased the appli cation of the technique in the biomedical field. These advances are described together with the established methods to enable the beginner to carry out a satisfactory separation and to gain the experience necessary for the full exploitation of the technique. R. J. Hamilton P. A. Sewell Liverpool,1981 1 Introduction to high performance liquid chromatography 1. 1 Introduction Chromatography in its many forms is widely used as a separative and an analytical technique. Gas chromatography since its introduction by James and Martin [1] has been pre-eminent in the field. Uquid chromatography in the of paper, thin-layer, ion-exchange, and exclusion (gel permeation and gel form filtration) chromatography had not been able to achieve the same success, mainly because of the poor efficiences and the long analysis times arising from the low mobile phase flow rates.
Book Synopsis Preparation and characterization of well-defined chemically bonded stationary phase for high pressure liquid chromatography by : Gerrit Engbertus Berendsen
Download or read book Preparation and characterization of well-defined chemically bonded stationary phase for high pressure liquid chromatography written by Gerrit Engbertus Berendsen and published by . This book was released on 1980 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Performance Liquid Chromatography by : Sandie Lindsay
Download or read book High Performance Liquid Chromatography written by Sandie Lindsay and published by John Wiley & Sons. This book was released on 1992-07-27 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: High performance liquid chromatography is the most powerful of all the chromatographic techniques, often achieving separations and analyses that would be difficult or impossible with other forms of chromatography. This study and training text examines the concepts and techniques used in this field. A selection of literature available from equipment manufacturers is included along with a brief review of some more specialized topics.
Book Synopsis The Synthesis and Characterization of Reversed Phase Stationary Phases for High Performance Liquid Chromatography by : Karen Wink Barnes
Download or read book The Synthesis and Characterization of Reversed Phase Stationary Phases for High Performance Liquid Chromatography written by Karen Wink Barnes and published by . This book was released on 1986 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reversed phase liquid chromatography (RPLC) is a widely used separation technique today. The stationary phase, composed of hydrocarbon moieties chemically bound to a silica support, is commonly prepared by refluxing the silica with a reactive silane in an appropriate solvent. Siloxane bonds, Si-O-Si, are formed. There are limitations to RPLC in that nonhomogeneous surface coverages, detrimental to efficient separations, result from the bonding process, and because the reaction is never complete due to steric restrictions. Also, silica is soluble at high pH values, and the Si-C bond binding the hydrocarbon to the silica is labile at low pH ranges. Thus, the usable pH range for silica stationary phases is 2.5 to 7.5, and often this range is too narrow to allow the separation of a mixture. The use of ultrasonic cavitation to catalyze silane bonding was investigated to dtermine whether the vigorous ultrasonic process would drive reagents into the surface pores and better distribute the hydrocar bonaceous reagent, thereby producing a more efficient stationary phase. Tandem reactions proved that ultrasonic bonding procedures are as effective as the refluxed, and that the chromatographic efficiency of the ultrasonic phases was comparable, if not superior, to the refluxed. Chromatographic tests also indicated the ultrasonic phases were comparable to commercially available phases. The reproducibility of the reactions and the effect of acoustic power and heat were also investigated. A second set of experiments investigated substitution of alumina for silica because the alumina crystalline structure remains intact over a pH range of 2 to 12. A trifunctional modification scheme generating a thick cross-linked hydrocarbon matte was used because the Al-0 bond is susceptible to hydrolysis, which strips the bound hydrocarbons, by polar RP solvents. Five aluminas were bonded and tested for chromatographic utility. Reaction conditions were optimized, and ultrasonic bonding was investigated. It was found that alumina with a sufficiently active surface is modifiable, and that the modified surface is remarkably stable for use with acidic and basic buffers and in neutral, polar solvent mixtures. The chromatographic utility of alumina phases was demonstrated and compared with the silica results.
Book Synopsis High Performance Liquid Chromatography by : Omar Al Sayed Omar
Download or read book High Performance Liquid Chromatography written by Omar Al Sayed Omar and published by Walter de Gruyter GmbH & Co KG. This book was released on 2022-02-21 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides an indispensable guide on how to use HPLC in pharmaceutical analysis and drug control. Following a hands-on approach, the authors give practical advices how to prepare stationary and mobile phases, choose a suitable detector and set up an HPLC analysis. The publication gives insight into the key pharmaceutical applications of HPLC and the latest requirements of the major regulatory agencies.
Book Synopsis Practical High-Performance Liquid Chromatography by : Veronika R. Meyer
Download or read book Practical High-Performance Liquid Chromatography written by Veronika R. Meyer and published by John Wiley & Sons. This book was released on 2004-10 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher Description
