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WEFTA interlaboratory comparison on total lipid determination in fishery products using the Smedes method

AuthorsKarl, H.; Oehlenschläger, J.; Bekaert, K.; Bergé, Jean-Pascal; Cadun, A.; Duflos, G.; Poli, B. M.; Tejada Yábar, Margarita ; Testi, S.; Timm-Heinrich, M.
Issue Date2012
PublisherAOAC International
CitationJournal of AOAC International 95: 489- 493 (2012)
AbstractLipid determination by the Smedes method was tested in an interlaboratory trial performed by nine laboratories from seven countries belonging to the West European Fish Technologists Association Analytical Methods Working Group. Five samples of fish and fishery products with different lipid contents, including two blind duplicates, were distributed among the participants. All laboratories applied a slightly modified Smedes method, which included extraction of lipids by cyclohexane and isopropanol, transfer of lipids to the cyclohexane phase by addition of water, phase separation by centrifugation, and gravimetric lipid determination. The results indicate that the RSD for reproducibility (RSDR) was between 4.11 and 6.31% for samples with moderate (7%) and high (14%) lipid content, depending on the sample. Larger SDs among the laboratories were obtained for a cod sample with low lipid content of 0.5%. The method is judged to be suitable as a routine method for lipid determination in fish and fishery products. © 2012 Publishing Technology.
Identifiersdoi: 10.5740/jaoacint.11-041
issn: 1060-3271
Appears in Collections:(ICTAN) Artículos
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