Download EBOOK Supercritical Fluid Extraction and Its Use in Chromatographic Sample Preparation PDF for free


Download EBOOK Supercritical Fluid Extraction and Its Use in Chromatographic Sample Preparation PDF for free Category: Science & Geography
The author of the book: S.A. Westwood
Format files: PDF, EPUB, TXT, DOCX
The size of the: 626 KB
Language: English
ISBN-13: 9780751400892
Edition: Chapman and Hall
Date of issue: 30 November 1992

Description of the book "Supercritical Fluid Extraction and Its Use in Chromatographic Sample Preparation":

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 PDF 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 ePub 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.

Download EBOOK Supercritical Fluid Extraction and Its Use in Chromatographic Sample Preparation PDF for free


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S.A. Westwood

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Download EBOOK Supercritical Fluid Extraction and Its Use in Chromatographic Sample Preparation PDF for free



Download EBOOK Supercritical Fluid Extraction and Its Use in Chromatographic Sample Preparation for free

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