Beltrán María, Sánchez-Astudillo María, Aparicio Ramón, García-González Diego L
Department of Chemistry and Science of Materials, Faculty of Experimental Sciences, University of Huelva, Avda. Tres de Marzo S/N, 21071 Huelva, Spain.
Instituto de la Grasa (CSIC), Padre García Tejero 4, 41012 Sevilla, Spain.
Food Chem. 2015 Feb 15;169:350-7. doi: 10.1016/j.foodchem.2014.07.104. Epub 2014 Aug 12.
The geographical traceability of virgin olive oil can be controlled by chemical species that are linked to the production area. Trace elements are among these species. The hypothesis is that the transfer of elements from the soil to the oil is subjected to minor variations and therefore this chemical information can be used for geographical traceability. In order to confirm this hypothesis, the trace elements of virgin olive oils from south-western Spain were analysed, and the same elements were determined in the corresponding olive-pomaces and soils. The differences in the concentration were studied according to cultivars and locations. Results show some coincidences in the selection of elements in soils (W, Fe, Na), olive-pomace (W, Fe, Na, Mg, Mn, Ca, Ba, Li) and olive oils (W, Fe, Mg, Mn, Ca, Ba, Li, Bi), which supports their utility in traceability. In the case of olive oils, 93% of the samples were correctly classified in their geographical origins (96% for Beas, 77% for Gibraleón, 91% for Niebla, and 100% for Sanlúcar de Guadiana).
初榨橄榄油的地理可追溯性可以通过与产地相关的化学物质来控制。微量元素就在这些物质之中。假设是元素从土壤到油中的转移变化较小，因此这种化学信息可用于地理可追溯性。为了证实这一假设，对西班牙西南部初榨橄榄油中的微量元素进行了分析，并在相应的橄榄果渣和土壤中测定了相同的元素。根据品种和产地研究了浓度差异。结果表明，土壤（钨、铁、钠）、橄榄果渣（钨、铁、钠、镁、锰、钙、钡、锂）和橄榄油（钨、铁、镁、锰、钙、钡、锂、铋）中元素的选择存在一些一致性，这支持了它们在可追溯性方面的实用性。就橄榄油而言，93%的样品在地理来源上被正确分类（贝阿斯为96%，希布拉莱昂为77%，涅夫拉为91%，瓜迪亚纳河畔圣卢卡尔为100%）。
