Author
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King, Jerry |
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Submitted to: ARS Food Safety and Inspection Service Research Workshop
Publication Type: Abstract Only Publication Acceptance Date: 12/5/1996 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: An AOAC collaborative was initiated involving 14 laboratories to test a method employing supercritical fluid extraction (SFE) for fat analysis according to the nutritional labeling definition of fat. Variable results were obtained due to either extraction irreproducibility or analysis of the resulting fatty acid methyl ester (FAME) distribution. An alternative fat analysis method employing a supported lipase catalyst in conjunction with subsequent GC-FAME analysis has shown exceptional promise for NLEA-analysis of the fat content of meats and other foodstuffs, provided adequate control is maintained over the water content of the food matrix. A new approach utilizing binary fluid mixtures has been initiated which extracts the target pesticides, while leaving the interferring lipid matter behind in the extraction vessel. The use of solid phase microextraction (SPME) shows promise for isolating volatile and semivolatile contaminants from meat samples prior to on-line GC/MS analysis. A subcritical water extractor is currently being tested and a commercial instrument modified to permit "hot water" extractions of toxicants in foods. |
