Extraction Chromatography
Author | : |
Publisher | : Elsevier |
Total Pages | : 585 |
Release | : 1975-06-01 |
Genre | : Science |
ISBN | : 0080858023 |
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Extraction Chromatography
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Author | : |
Publisher | : Elsevier |
Total Pages | : 585 |
Release | : 1975-06-01 |
Genre | : Science |
ISBN | : 0080858023 |
Extraction Chromatography
Author | : Bernd Wenclawiak |
Publisher | : Springer Science & Business Media |
Total Pages | : 225 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 3642774741 |
The use of supercritical fluids in analytical chemistry is still grow ing. More and more analysts are discovering the favorable advan tages for a number of applications. Especially supercritical fluid extraction (SFE) has attracted a lot of interest in recent years due to its simplicity. Supercritical fluid chromatography (SFC) has become better established and the development of this technique has been accelerated by the many applications with capillary col umns which have been published in the literature. At first SFC equipment was based on instruments commonly used for liquid chromatography, and the first commercial in struments were derived from this technology. However, capillary columns can be much more easily interfaced to gas chromatogra phy equipment especially to the detectors commonly used for Oc. Many stationary phases both for packed micro columns and capillary columns have been designed for SFC purposes extending this technology to LC and OC. The most common fluid applied in SFC and SFE is carbon dioxide. The advantages of supercritical CO , such as having dif 2 fusivity like a gas and solvating power depending on temperature and pressure, are also valid for other fluids and modified fluids. Both properties are valuable for sample extraction and extraction selectivity.
Author | : Tibor Braun |
Publisher | : |
Total Pages | : 565 |
Release | : 1975 |
Genre | : Liquid chromatography |
ISBN | : 9789630502207 |
Author | : Thomas Caudell |
Publisher | : Routledge |
Total Pages | : 467 |
Release | : 2018-05-08 |
Genre | : Science |
ISBN | : 1351422502 |
An exploration of fundamental as well as practical aspects of supercritical fluid chromatography and extraction. It addresses topics such as: packed columns in SFC; detection in SFC; supercritical fluid chromatography/mass spectroscopy; and evaporative light scattering detection in SFC.
Author | : Colin F. Poole |
Publisher | : Elsevier |
Total Pages | : 740 |
Release | : 2019-09-12 |
Genre | : Science |
ISBN | : 0128169079 |
Solid Phase Extraction thoroughly presents both new and historic techniques for dealing with solid phase extraction. It provides all information laboratory scientists need for choosing and utilizing suitable sample preparation procedures for any kind of sample. In addition, the book showcases the contemporary uses of sample preparation techniques in the most important industrial and academic project environments, including solid-phase Microextraction, molecularly imprinted polymers, magnetic nanoparticles, and more. Written by recognized experts in their respective fields, this one-stop reference is ideal for those who need to know which technique to choose for solid phase extraction. Used in conjunction with a similar release, Liquid Phase Extraction, this book allows users to master this crucial aspect of sample preparation. Defines the current state-of-the-art in extraction techniques and the methods and procedures for implementing them in laboratory practice Includes extensive referencing that facilitates the identification of key information Aimed at both entry-level scientists and those who want to explore new techniques and methods
Author | : Thomas Caudell |
Publisher | : CRC Press |
Total Pages | : 450 |
Release | : 1999-03-08 |
Genre | : Science |
ISBN | : 9789057024092 |
This book explores the fundamental and practical aspects of supercritical fluid chromatography (SFC) and extraction. It discusses packed columns in SFC; detection in SFC; supercritical fluid chromatography/mass spectroscopy; and evaporative light scattering detection in SFC.
Author | : S.A. Westwood |
Publisher | : Springer Science & Business Media |
Total Pages | : 180 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9401121648 |
by Professor D. E. Games, Mass Spectrometry Research Unit, University College of Swansea Sample preparation can be viewed as occupying a Cinderella role in analytical science. However, the quality of sample preparation plays a key role in high In the past decade, there has been quality analysis and deserves higher stature. considerable interest in the use of supercritical fluid extraction (SFE) as an alternative to conventional procedures for the preparation of samples for ana lysis. The driving force for this development is the need for automated, sim pler, faster, non-destructive and selective methods for extraction, preferably using non-toxic extraction media which are easily disposed of. Utilization of supercritical fluids for extraction fulfils these requirements because of their unique physical chemical properties and usually low toxicity. Selectivity can be achieved by suitable selection of pressure (density), temperature and modi fier conditions which enable solvating power to be varied. The high diffusivity of supercritical fluids provides rapid sample penetration and extraction. Use of fluids with low critical temperatures enables extraction to be conducted under mild thermal conditions ensuring that thermally labile compounds do not decompose. The technique can be used off-line, and the extracts analysed by appropriate techniques, or it can be used on-line, by coupling with a variety of chromatographic techniques. These can then, if necessary, be coupled fur ther with spectroscopic techniques, such as Fourier transform infrared, ultra violet or mass spectrometry, to provide specific identification or structural information.
Author | : Douglas T. Gjerde |
Publisher | : John Wiley & Sons |
Total Pages | : 206 |
Release | : 2009-07-10 |
Genre | : Science |
ISBN | : 3527627200 |
This first book on the market covers the many new and important RNA species discovered over the past five years, explaining current methods for the enrichment, separation and purification of these novel RNAs. Building up from general principles of RNA biochemistry and biophysics, this book addresses the practical aspects relevant to the laboratory researcher throughout, while discussing the performance and potential problems of the methods discussed. An appendix contains a glossary with the important terms and techniques used in RNA analysis. By explaining the basic and working principles of the methods, the book allows biochemists and molecular biologists to gain much more expertise than by simply repeating a pre-formulated protocol, enabling them to select the procedure and materials best suited to the RNA analysis task at hand. As a result, they will be able to develop new protocols where needed and optimize and fine-tune the general purpose standard protocols that come with the purification equipment and instrumentation.
Author | : Colin F. Poole |
Publisher | : Elsevier |
Total Pages | : 818 |
Release | : 2019-08-29 |
Genre | : Science |
ISBN | : 0128169125 |
Liquid Phase Extraction thoroughly presents both existing and new techniques in liquid phase extraction. It not only provides all information laboratory scientists need for choosing and utilizing suitable sample preparation procedures for any kind of sample, but also showcases the contemporary uses of sample preparation techniques in the most important industrial and academic project environments, including countercurrent chromatography, pressurized-liquid extraction, single-drop Microextraction, and more. Written by recognized experts in their respective fields, it serves as a one-stop reference for those who need to know which technique to choose for liquid phase extraction. Used in conjunction with a similar release, Solid Phase Extraction, it allows users to master this crucial aspect of sample preparation. Defines the current state-of-the-art in extraction techniques and the methods and procedures for implementing them in laboratory practice Includes extensive referencing that facilitates the identification of key information Aimed at both entry-level scientists and those who want to explore new techniques and methods
Author | : E.D. Ramsey |
Publisher | : Springer Science & Business Media |
Total Pages | : 449 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9401149488 |
During the past decade supercritical fluid extration (SFE) has attracted considerable attention as a sample preparation procedure in analytical chemistry. The successful implementation of this technique can lead to improved sample throughput, more efficient recovery of analytes, cleaner extracts, economic replacement of halogenated solvents and a high level of automation, compared to conventional sample preparation procedures. This book provides an overview of basic principles of SFE as well as in-depth reviews of both on- and off-line SFE methods. The on-line coupling of SFE with both chromatographic and spectroscopics techniques has been the subject of a great deal of research effort and is dealt with in detail. Newer developments, such as off-line SFE of solid and liquid matrices, are starting to attract a great deal of interest, and the coverage of these areas will prove of particular value to the analytical chemist. The international team of authors has illustrated these topics with many `state-of-the-art' applications, and each chapter provides a comprehensive list of references. For the convenience of the reader, an appendix which contains pressure conversion scales and supercritical fluid carbon dioxide density tables appears at the end of the book. The volume's extensive coverage of both on-line and off-line extraction will be particularly useful to analytical chemists, in a wide range of environments, seeking to develop high quality, simple and robust SFE methods.