Abstract Monovarietal extra virgin olive oils (EVOOs) from Olea europea trees grown in the same experimental orchard have been characterized by Raman spectroscopy combined with chemometrics. Linear discriminant analysis of the EVOO Raman spectra correctly classified up to 94.4% of samples, as a function of the cultivar, at four different maturation stages. The sensitivity of Raman spectroscopy to the oil cultivar is due to the genotypic dependence of the olive oil composition in terms of both carotenoid and fatty acids. Thus, using gas chromatography as the reference technique, models for predicting the oleic, palmitic and linoleic acid content are obtained combining Raman spectra and partial least squares regression analysis. Evidences that a similar approach could be implemented also for carotenoid characterization are provided.

中文翻译：

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单品种橄榄油的品种鉴别、脂肪酸谱和类胡萝卜素表征，通过拉曼光谱一目了然

摘要 来自同一实验果园中种植的欧洲油橄榄树的单品种特级初榨橄榄油 (EVOO) 已通过拉曼光谱结合化学计量学进行表征。EVOO 拉曼光谱的线性判别分析在四个不同的成熟阶段正确分类了多达 94.4% 的样品，作为栽培品种的函数。拉曼光谱对油品种的敏感性是由于橄榄油成分在类胡萝卜素和脂肪酸方面的基因型依赖性。因此，使用气相色谱作为参考技术，结合拉曼光谱和偏最小二乘回归分析获得预测油酸、棕榈酸和亚油酸含量的模型。提供了类似方法也可以用于类胡萝卜素表征的证据。