Cross-validation in linear discriminant analysis of triacylglycerol structural data from Istrian olive oils

This paper describes the differentiation and classification of olive oil sa mples produced in the Istrian peninsula in 3 areas characterized by differe nt climatic conditions: Capodistria and Parenzo and Pola, The triacylglycer ol (TAG) fraction of 41 samples of virgin olive oil was analyzed. In partic ular, TAG stereospecific analysis was performed to obtain the positional di stribution of the fatty acids in the; glycerol backbone. The quantitative d ata were evaluated by using Linear Discriminant Analysis, and the results o btained showed a differentiation of the olive oil samples according to thei r geographical origin. A cross-validation procedure, the Leave-One-Out clas sifier, was applied to test the adequacy of the discriminant model.