title: Classification and adulteration detection of vegetable oils based on fatty acid profiles.
abstract: The detection of adulteration of high priced oils is a particular concern in food quality and safety. Therefore, it is necessary to develop authenticity detection method for protecting the health of customers. In this study, fatty acid profiles of five edible oils were established by gas chromatography coupled with mass spectrometry (GC/MS) in selected ion monitoring mode. Using mass spectral characteristics of selected ions and equivalent chain length (ECL), 28 fatty acids were identified and employed to classify five kinds of edible oils by using unsupervised (principal component analysis and hierarchical clustering analysis), supervised (random forests) multivariate statistical methods. The results indicated that fatty acid profiles of these edible oils could classify five kinds of edible vegetable oils into five groups and are therefore employed to authenticity assessment. Moreover, adulterated oils were simulated by Monte Carlo method to establish simultaneous adulteration detection model for five kinds of edible oils by random forests. As a result, this model could identify five kinds of edible oils and sensitively detect adulteration of edible oil with other vegetable oils about the level of 10%.
authors: Oil Crops Research Institute, Chinese Academy of Agricultural Sciences , Wuhan 430062, China.
authors: Liangxiao
authors: L
authors: Zhang
authors: Peiwu
authors: P
authors: Li
authors: Xiaoman
authors: X
authors: Sun
authors: Xuefang
authors: X
authors: Wang
authors: Baocheng
authors: B
authors: Xu
authors: Xiupin
authors: X
authors: Wang
authors: Fei
authors: F
authors: Ma
authors: Qi
authors: Q
authors: Zhang
authors: Xiaoxia
authors: X
authors: Ding
mesh_terms: D005227:Fatty Acids / Q000737:chemistry*; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D010938:Plant Oils / Q000737:chemistry* / Q000145:classification
chemical_list: D005227:Fatty Acids; D010938:Plant Oils