analytical supercritical fluid extraction techniques

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Analytical Supercritical Fluid Extraction Techniques

Author : E.D. Ramsey
ISBN : 9789401149488
Genre : Science
File Size : 71. 7 MB
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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.

Analytical Supercritical Fluid Extraction

Author : Maria D. Luque de Castro
ISBN : 9783642786730
Genre : Science
File Size : 26. 98 MB
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Recent advances in analytical chemistry have turned it into a virtually unrecognizable science compared to a few decades ago, when it lagged behind other sciences and techniques. However, advances in analytical science have been far from universal: while innovations in instrumentation and data acquisition and processing systems have reached unprecedented levels thanks to parallel breakthroughs in computer science and chemo metrics, progress in preliminary operations has been much slower despite their importance to analytical results. Thus, such clear trends in analytical process development as automation and miniaturization have not reached preliminary operations to the same extent, even though this area is pro bably in the greatest need. Improvement in preliminary operations is thus an urgent goal of analytical chemistry on the verge of the twenty first century. Increased R&D endeavours and manufacture of commercially available automatic equipment for implementation of the wide variety of operations that separate the uncollected, unmeasured, untreated sample from the signal measuring step are thus crucial on account of the wide variability of such operations, which precludes development of all-purpose equipment, and the complexity of some, particularly relating to solid samples. Supercritical fluid extraction opens up interesting prospects in this context and is no doubt an effective approach to automatioI1 and mini aturization in the preliminary steps of the analytical process. The dramatic developments achieved in its short life are atypical in many respects.

Hyphenated Techniques In Supercritical Fluid Chromatography And Extraction

Author : K. Jinno
ISBN : 0080858619
Genre : Science
File Size : 42. 76 MB
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This is the first book to focus on the latest developments in hyphenated techniques using supercritical fluids. The advantages of SFC in hyphenation with various detection modes, such as FTIR, MS, MPD and ICP and others are clearly featured throughout the book. Special attention is paid to coupling of SFE with GC or SFC. In this edited volume, chapters are written by leading experts in the field. The book will be of interest to professionals in academia, as well as to those researchers working in an industrial environment, such as analytical instrumentation, pharmaceuticals, agriculture, food, petrochemicals and environmental.

Supercritical Fluid Extraction

Author : Larry T. Taylor
ISBN : 0471119903
Genre : Science
File Size : 60. 41 MB
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Clear, Practical Coverage of an Important Reemerging Technology Supercritical Fluid Extraction provides a clear, practical, step-by-step introduction to a sample preparation method that helps laboratories reduce or eliminate the use of halogenated solvents, extract samples more quickly and efficiently, and improve the accuracy of their results. By encouraging a deliberate, systematic approach to supercritical fluid extraction (SFE) methods and techniques, this book enables scientists and technicians to avoid disappointing results and erroneous conclusions and develop reliable guidelines for using this versatile technology. It demonstrates how to make the most of a process that is highly reproducible, fast, and quantitative at sub-ppb levels; preserves the chemical integrity of the analyte to be extracted; and yields a concentrated sample solution that can be easily manipulated. Topics covered include: * Properties of supercritical fluids * Functional group solubility in supercritical fluids * Collection efficiency in off-line SFE * Extraction strategies * Applications of analytical SFE For analytical chemists, technicians, and laboratory managers, this book is the key to a technology that can make every sample extraction and analysis cleaner, more efficient, and more reliable.

Analysis With Supercritical Fluids Extraction And Chromatography

Author : Bernd Wenclawiak
ISBN : 9783642774744
Genre : Science
File Size : 21. 6 MB
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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.

Analytical Supercritical Fluid Extraction Of Lipid Containing Samples

Author : Mattias Järemo
ISBN : UOM:39015051618513
Genre : Science
File Size : 48. 3 MB
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The 3rd European Symposium On Analytical Supercritical Fluid Chromatography And Extraction

Author :
ISBN : PSU:000043220793
Genre : Supercritical fluid chromatography
File Size : 59. 88 MB
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Supercritical Fluid Technology In Oil And Lipid Chemistry

Author : Jerry W. King
ISBN : 0935315713
Genre : Technology & Engineering
File Size : 62. 45 MB
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Thermodynamics of supercritical fluids with respect to lipid-containing systems; Solubility measurement of lipid constituents in supercritical fluids; Supercritical fluid extraction of oilseeds/lipids in natural products; Supercritical fractionation of lipids; Oilseed solubility and extraction modeling; Modeling of the supercritical fluid extraction rate of oilseeds; Design and economic analysis of supercritical fluid extraction processes; Supercritical fluid extraction and fractionation of fish oils; Supercritical fluid extraction of egg lipids; Supercritical fluid extraction of Cocoa and Cocoa products; Superctitical CO2 extraction of meat products and edible animal fats for cholesterol reduction; Supercritical fluid extraction of algae; Effect of supercritical fluids on residual meals and protein functionality; Treatment of food materials with supercritical carbon dioxide; Enzymatic synthesis in supercritical fluids; Basic principles and the role of supercritical fluid chromatography in lipid analysis; Supercritical fluid chromatography for the analysis of oleochemicals; Supercritical fluid chromatography of trace components in oils and fats; Analytical supercritical fluid extraction for oil and lipid analysis.

Analytical Separation Science

Author : Jared Anderson
ISBN : 9783527333745
Genre : Science
File Size : 52. 52 MB
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Leading the way for analytical chemists developing new techniques. Introductory Price Available! Order your print copy before 30th April 2016 and save! £650 / $1,075 / €799 List price thereafter: £735 / $1,210 / €899 This new comprehensive 5 volume set on separation science provides a much needed research-level text for both academic users and researchers who are working with and developing the most current methods, as well as serving as a valuable resource for graduate and post-graduate students. Comprising of five topical volumes it provides a comprehensive overview of the subject, highlighting aspects that will drive research in this field in the years to come. Volume 1: Liquid Chromatography Volume 2: Special Liquid Chromatography Modes and Capillary Electromigration Techniques Volume 3: Gas, Supercritical and Chiral Chromatography Volume 4: Chromatographic and Related Techniques Volume 5: Sample Treatment, Method Validation, and Applications Key Features: - Comprises over 2,100 pages in 5 volumes – available in print and online - Edited by an international editorial team which has both prominent and experienced senior researchers as well as young and dynamic rising stars - Individual chapters are labeled as either introductory or advanced, in order to guide readers in finding the content at the appropriate level - Fully indexed with cross referencing within and between all 5 volumes

Applications Of Supercritical Fluids In Industrial Analysis

Author : J.R. Dean
ISBN : 9789401121460
Genre : Science
File Size : 86. 99 MB
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The continued search for rapid, efficient and cost-effective means of analytical measurement has introduced supercritical fluids into the field of analytical chemistry. Two areas are common: supercritical fluid chroma tography and supercritical fluid extraction. Both seek to exploit the unique properties of a gas at temperatures and pressures above the critical point. The most common supercritical fluid is carbon dioxide, employed because of its low critical temperature (31 °C), inertness, purity, non-toxicity and cheapness. Alternative supercritical fluids are also used and often in conjunction with modifiers. The combined gas-like mass transfer and liquid-like solvating characteristics have been used for improved chroma tographic separation and faster sample preparation. Supercritical fluid chromatography (SFC) is complementary to gas chro matography ( GC) and high performance liquid chromatography (HPLC), providing higher efficiency than HPLC, together with the ability to analyse thermally labile and high molecular weight analytes. Both packed and open tubular columns can be employed, providing the capability to analyse a wide range of sample types. In addition, flame ionization detection can be used, thus providing 'universal' detection.

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