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Fuentes de Mendoza, Manuel; De Miguel Gordillo, Concepción; Marín Expóxito, Julia; Sánchez Casas, Jacinto; Martínez Cano, Manuel; Martín Vertedor, Daniel; Franco Baltasar, Ma Nieves
Food chemistry, 12/2013, Volume: 141, Issue: 3Journal Article
•Characterisation of virgin olive oils produced in Extremadura.•Analysis of fatty acids, triglycerides, sterols and triterpenic dialcohols.•Relation between chemistry composition and ripeness maturation. The aim of this study was the classification of olive oil according to the stage of ripeness of the olives used for its manufacture. A discriminant analysis was applied taking as dependent variables the fatty acids, triglycerides and sterols profile. The evolution of parameters of quality of the oils during ripening of the fruit has also been studied in three successive crops. The results of the classification shows that 88.5% of selected original grouped cases are correctly classified (85.7% green, 80% spotted and 78.9% ripe) and furthermore the validation classified the 69.6% of the unselected original cases. The most discriminating variables have been: avenasterol, linolenic acid, β-sitosterol and gadoleico. Fig. 1 shows graphically the values of the canonical discriminant functions and the centroids of the intervals of three or the maturity index.
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