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- W1190053257 abstract "This chapter discusses various factors that influence the instrumentation and application of offline supercritical fluid extraction (SFE), supercritical fluid extraction/ gas chromatography [(SFE)/GC], and SFE/SFC. SFE and on-line SFE methods such as SFE/GC and SFE/SFC are highly sophisticated techniques for sample preparation from a variety of matrices. They offer speed, minimum sample contamination and sample losses, sensitivity, low cost, and the possibility to automate the total sample preparation and analytical procedure. The extraction of herbs by SFE is more than one hour faster than the normal sample preparation by hydrodistillation. Additionally, the drastic effects of heating (degradation and formation of artifacts) involved in hydrodistillation can be avoided. However, SFE methods are not always as easy to carry out as they are supposed to be, owing to instrumental shortcomings such as restrictor plugging and the lack of efficient and practical extract collection systems. Moreover, the knowledge of analyte/matrix interactions in the supercritical phase is incomplete. However, they offer an excellent alternative to other sample preparation techniques and many of the current problems are expected to be eliminated in the near future." @default.
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- W1190053257 date "1992-01-01" @default.
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- W1190053257 title "Chapter 14 SFE, SFE/GC and SFE/SFC: Instrumentation and Applications" @default.
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- W1190053257 doi "https://doi.org/10.1016/s0301-4770(08)61236-1" @default.
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