King, J.W. and France, J.E. and Snyder, J.M.
(1992)
On-line supercritical fluid extraction-supercritical fluid reaction-capillary gas chromatography analysis of the fatty acid composition of oilseeds.
Fresenius' Journal of Analytical Chemistry, 344 (10-11).
pp. 474-478.
Abstract
The versatility of supercritical fluid extraction
(SFE) directly coupled with gas chromatography (GC) is
further expanded by the addition of an on-line derivatization technique that is performed under supercritical fluid conditions. The integrated extraction and derivatization technique has been applied to the determination of the fatty acid composition of oilseeds. Triglycerides are extracted from seed samples using SC-CO2 and transesterified to methyl esters, in situ, over a solid catalyst. Experimental conditions were selected such that the methyl esters are preferentially eluted from the catalyst. A linear capillary restrictor was used to deposit the effluent from the supercritical fluid extractor/reactor onto a retention gap precolumn in the GC. Applications of the on-line SFE-SFR-GC technique include the analysis of single soybean, evening primrose, and peanut seeds...
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