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Author: Mattias Järemo
Publisher:
ISBN:
Category : Supercritical fluid extraction
Languages : en
Pages : 152
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Book Description
Author: Mattias Järemo
Publisher:
ISBN:
Category : Supercritical fluid extraction
Languages : en
Pages : 152
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Book Description
Author: Jerry W. King
Publisher: The American Oil Chemists Society
ISBN: 9780935315714
Category : Science
Languages : en
Pages : 456
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Book Description
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.
Author: E.D. Ramsey
Publisher: Springer Science & Business Media
ISBN: 9401149488
Category : Science
Languages : en
Pages : 449
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Book Description
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.
Author: Maria D. Luque de Castro
Publisher: Springer Science & Business Media
ISBN: 3642786731
Category : Science
Languages : en
Pages : 332
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Book Description
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.
Author: S.A. Westwood
Publisher: Springer Science & Business Media
ISBN: 9401121648
Category : Science
Languages : en
Pages : 180
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Book Description
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: Bernd Wenclawiak
Publisher: Springer Science & Business Media
ISBN: 3642774741
Category : Science
Languages : en
Pages : 225
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Book Description
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: Eugene W. Hammond
Publisher: CRC Press
ISBN: 9780849342554
Category : Science
Languages : en
Pages : 206
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Book Description
Chromatography for the Analysis of Lipids focuses on the three main chromatographic techniques for analyzing lipids: thin layer (TLC), gas liquid (GLC), and high performance liquid chromatography (HPLC). It also covers supercritical fluid chromatography (SFC). Applications for each chromatographic technique are discussed with emphasis on their quantitative aspects and suitability for use, and variations in technique are covered in detail. Figures are used throughout the book to illustrate typical results, which shows end points that can be compared in your own laboratory. This important technical book will be an excellent workbench companion for chromatographers, food scientists, lipid chemists, analytical chemists, and others who use chromatographic techniques for lipid analysis.
Author: Bernd Wenclawiak
Publisher:
ISBN: 9783642774751
Category :
Languages : en
Pages : 232
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Book Description
The editor has brought together in a compact and readable form the new methods of analytical chemistry using supercritical fluids. The volume provides comprehensive treatment of supercritical fluid chromatography (SFC) and supercritical fluid extraction (SFE); it discusses both theory and practice. The contributions are written by leading experts in their fields with exhaustive practical experience in SFC and SFE. Special attention is given to the description of applications and thus provides the experienced analyst with invaluable information widely scattered in the literature and helps the novice to adopt these new techniques quickly in his laboratory. An addendum includes brand new literature on SFC and SFE.
Author: S.C. Moldoveanu
Publisher: Elsevier
ISBN: 0080540708
Category : Science
Languages : en
Pages : 949
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Book Description
Sample preparation is an essential step in many analyses. This book approaches the topic of sample preparation in chromatography in a methodical way, viewing it as a logical connection between sample collection and analytical chromatography. Providing a guide for choosing the appropriate sample preparation for a given analysis, this book describes various ways to process the sample, explaining the principle, discussing the advantages and disadvantages, describing the applicability to different types of samples, and showing the fitness to specific chromatographic determinations. The first part of the book contains an overview of sample preparation showing its relation to sample collection and to the core chromatographic analysis. The second part covers procedures that do not use chemical modifications of the analyte and includes methods for sample dissolution, concentration and cleanup designed mainly for modifying the initial matrix of the sample. This part starts with conventional separations such as filtration and distillation and finishes with more advanced techniques such as solid phase extraction and electroseparations. The third part gives a description of the chemical modifications that can be performed on a sample either for fractionation purposes or to improve a specific property of the analyte. This part includes derivatizations, polymer chemical degradations, and pyrolysis.
Author: Larry T. Taylor
Publisher: Wiley-Interscience
ISBN:
Category : Science
Languages : en
Pages : 208
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Book Description
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.
