Rey-Giménez Raquel, Sánchez-Gimeno Ana Cristina
Laboratorio Agroambiental, Gobierno de Aragón, Avda. Montañana 1005, 50071 Zaragoza, Spain.
Tecnología de los Alimentos, Facultad de Veterinaria, Universidad de Zaragoza, Instituto Agroalimentario de Aragón-IA2, Miguel Servet 177, 50013 Zaragoza, Spain.
Foods. 2022 Aug 26;11(17):2587. doi: 10.3390/foods11172587.
Sterol composition is used as a "fingerprint" to demonstrate the authenticity of olive oils. Our study's objective was to exhaustively characterize the sterol composition of Empeltre olive oils from clonal selection during the ripening period in 2017, 2018, and 2019. We likewise assessed the influence of crop year, fruit ripening, and clonal selection on the oils' regulatory compliance in terms of sterol composition. Empeltre olive oils were shown to have medium-range -sitosterol and Δ5-avenasterol content, along with elevated amounts of campesterol and Δ7-stigmastenol. A total of 26% and 12% of the samples were non-compliant in terms of apparent -sitosterol and Δ7-stigmastenol, respectively. Crop year was the most influential factor in the case of most sterols. Clone type was the least influential factor, except in the case of campesterol. Olive maturity was only significant for Δ7-sterols. We likewise applied a discriminant analysis, with "crop year" as the grouping variable: 94.9% of the oils were thereby classified correctly.
甾醇组成被用作一种“指纹图谱”来证明橄榄油的真实性。我们研究的目的是详尽地描述2017年、2018年和2019年成熟期间经过克隆选择的恩佩尔特雷橄榄油的甾醇组成。我们同样评估了年份、果实成熟度和克隆选择对这些油类甾醇组成方面法规合规性的影响。结果表明，恩佩尔特雷橄榄油具有中等含量的β-谷甾醇和Δ5-燕麦甾醇，以及较高含量的菜油甾醇和Δ7-豆甾烯醇。分别有26%和12%的样品在表观β-谷甾醇和Δ7-豆甾烯醇方面不符合规定。对于大多数甾醇而言，年份是最具影响力的因素。克隆类型是最不具影响力的因素，菜油甾醇的情况除外。橄榄成熟度仅对Δ7-甾醇有显著影响。我们同样进行了判别分析，将“年份”作为分组变量：由此94.9%的油类被正确分类。
