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Legal blends between olive oil and other vegetable oils: Quantification of olive oil and identification of "virgin olive oils", "refined olive oils" and "olive pomace oils"
Talanta Open Pub Date : 2021-03-13 , DOI: 10.1016/j.talo.2021.100039
Giovanni Presti , Salvatore Giuliano , Eleonora Gulotta , Maria Monfreda

The development of a standardized method for quantification of olive oil in legal blends with other vegetable oils is required for the marketing of these products according to the European Legislation and, therefore, to protect the consumer.

In this paper triacylglycerols, fatty acids, waxes, squalene and the total esterified sterols were analysed and processed by chemometrics tools. PCA highlighted a trend in separation of samples according to their percentage of olive oil. Quantification was done by PLS, giving a prediction error lower than 5% in a calibration range from 25% to 80% of olive oil. Therefore, the proposed method is suitable to resolve legal blends.

Furthermore, although not yet required by the EU legislation, a method was developed for the identification of "virgin olive oils", "refined olive oils" and "olive pomace oils" in blends, using SIMCA; 86.67% of the external test set was correctly classified.



中文翻译:

橄榄油和其他植物油之间的合法混合物:橄榄油的定量和“原始橄榄油”,“精制橄榄油”和“橄榄果渣油”的标识

根据欧洲法规,为了销售这些产品,需要开发一种标准化方法来定量合法混合其他植物油中的橄榄油。

本文通过化学计量学工具对三酰基甘油,脂肪酸,蜡,角鲨烯和总酯化固醇进行了分析和处理。PCA强调了根据样品中橄榄油的百分比进行分离的趋势。通过PLS进行定量,在25%至80%的橄榄油校准范围内,预测误差低于5%。因此,所提出的方法适用于解决合法混合问题。

此外,尽管欧盟立法尚无此要求,但仍使用SIMCA开发了一种用于鉴定混合物中“纯橄榄油”,“精制橄榄油”和“橄榄果渣油”的方法。正确分类了86.67%的外部测试集。

更新日期:2021-03-22
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