Analytical Supercritical Fluid Extraction

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Analytical Supercritical Fluid Extraction

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Author : Maria D. Luque de Castro
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Analytical Supercritical Fluid Extraction written by Maria D. Luque de Castro and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

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.

Analytical Supercritical Fluid Extraction Techniques

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Author : E.D. Ramsey
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Analytical Supercritical Fluid Extraction Techniques written by E.D. Ramsey and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

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.

Analysis With Supercritical Fluids Extraction And Chromatography

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Author : Bernd Wenclawiak
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Analysis With Supercritical Fluids Extraction And Chromatography written by Bernd Wenclawiak and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

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.

Supercritical Fluid Extraction Of Nutraceuticals And Bioactive Compounds

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Author : Jose L. Martinez
language : en
Publisher: CRC Press
Release Date : 2007-11-28

Supercritical Fluid Extraction Of Nutraceuticals And Bioactive Compounds written by Jose L. Martinez and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-11-28 with Science categories.

Enhanced concern for the quality and safety of food products, increased preference for natural products, and stricter regulations on the residual level of solvents, all contribute to the growing use of supercritical fluid technology as a primary alternative for the extraction, fractionation, and isolation of active ingredients. As a solvent-free p

Oil Extraction And Analysis

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Author : D. L. Luthria
language : en
Publisher: CRC Press
Release Date : 2019-06-07

Oil Extraction And Analysis written by D. L. Luthria and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-06-07 with Technology & Engineering categories.

This book contains papers from the symposium "Critical Issues, Current and Emerging Technologies for Determination of Crude Fat Content in Food, Feed and Seeds," held in 2003 at the AOCS Annual Meeting in Kansas City, Missouri. The topics covered give a broad perspective of the challenges and issues of the value-added enhanced products. This book w

Applications Of Supercritical Fluids In Industrial Analysis

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Author : J.R. Dean
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Applications Of Supercritical Fluids In Industrial Analysis written by J.R. Dean and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

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.

Quantitative Analytical Supercritical Fluid Extraction

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Author : David Frank Gillespie Walker
language : en
Publisher:
Release Date : 1995

Quantitative Analytical Supercritical Fluid Extraction written by David Frank Gillespie Walker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Supercritical fluid extraction categories.

Practical Supercritical Fluid Chromatography And Extraction

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Author : Thomas Caudell
language : en
Publisher: CRC Press
Release Date : 1999-03-08

Practical Supercritical Fluid Chromatography And Extraction written by Thomas Caudell and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-03-08 with Science categories.

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.

Unified Chromatography

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Author : J. F. Parcher
language : en
Publisher:
Release Date : 2000

Unified Chromatography written by J. F. Parcher and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Science categories.

Here, authors specializing in different branches of chromatography--including gas chromatography, supercritical fluid chromatography, and high-pressure liquid chromatography--describe their fields while drawing out connections with other branches.