title: Blends of olive oil and sunflower oil: characterisation and olive oil quantification using fatty acid composition and chemometric tools.
abstract: A method capable of recognising the percentage of olive oil in a blend is required to verify whether its labelling complies with the statements set out by the Commission Regulation (EC) No. 1019/2002. In this study an analytical methodology was developed in order to define blends of olive oil and sunflower oil, which contain 50% of olive oil, compared to blends with 40% and 60% of it, respectively. Methyl esters of fatty acids were analysed by GC-FID and processed through chemometric tools (PCA, TFA, SIMCA and PLS). A strong differentiation of blends according to the amount of olive oil contained and a quantification model with a standard error of prediction of 1.51% were obtained. As this issue represents a significant analytical challenge, variability associated with the fatty acid composition of olive oil was first studied.
authors: Central Directorate for Chemical Analysis and Development of Laboratories, Italian Customs Agency, via M. Carucci 71, 00143 Rome, Italy. maria.monfreda@gmail.com
authors: M
authors: M
authors: Monfreda
authors: L
authors: L
authors: Gobbi
authors: A
authors: A
authors: Grippa
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000379:methods*; D002849:Chromatography, Gas / Q000379:methods*; D005227:Fatty Acids / Q000737:chemistry*; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry*; D011786:Quality Control; D000074242:Sunflower Oil
chemical_list: D005227:Fatty Acids; D000069463:Olive Oil; D010938:Plant Oils; D000074242:Sunflower Oil