A Microwave-assisted Derivatization and GC-MS Method Coupled with Calibration Transformation Matrix for Determination of Fatty Acid in Edible Oils
HE Xiao-qing
Abstract
HE Xiao-qing
Abstract
A microwave-assisted derivatization and GC-MS method coupled with calibration transformation matrix was developed for determination of fatty acid in edible oils.The optimum conditions for microwave-asˉsisted derivatization were investigated in detail.The calibration model was verified with40synthetic samples containing known contents of peanut oil,rape oil,sesame oil,cotton oil,and palm oil.The average deviaˉtions fromthe known values for all samples were less than5%.Eight commercial samples were analyzed with this method,and three products were identified as being adulterated.The results from other samples agreed fairly well with what was given on the labels.This method can be used to determine the contents of edible oils rapidly and accurately,as well as to identify adulterated commercial products.
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A microwave-assisted derivatization and GC-MS method coupled with calibration transformation matrix was developed for determination of fatty acid in edible oils.The optimum conditions for microwave-asˉsisted derivatization were investigated in detail.The calibration model was verified with40synthetic samples containing known contents of peanut oil,rape oil,sesame oil,cotton oil,and palm oil.The average deviaˉtions fromthe known values for all samples were less than5%.Eight commercial samples were analyzed with this method,and three products were identified as being adulterated.The results from other samples agreed fairly well with what was given on the labels.This method can be used to determine the contents of edible oils rapidly and accurately,as well as to identify adulterated commercial products.
Key concepts: Derivatization, Chemistry, Chromatography, Matrix (chemical analysis), Gas chromatography–mass spectrometry, Calibration curve, Calibration, High-performance liquid chromatography