title: Geographical traceability of virgin olive oils from south-western Spain by their multi-elemental composition.
abstract: 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).
authors.affiliation: Department of Chemistry and Science of Materials, Faculty of Experimental Sciences, University of Huelva, Avda. Tres de Marzo S/N, 21071 Huelva, Spain.
authors.forename: María
authors.initials: M
authors.lastname: Beltrán
authors.affiliation: Department of Chemistry and Science of Materials, Faculty of Experimental Sciences, University of Huelva, Avda. Tres de Marzo S/N, 21071 Huelva, Spain.
authors.forename: María
authors.initials: M
authors.lastname: Sánchez-Astudillo
authors.affiliation: Instituto de la Grasa (CSIC), Padre García Tejero 4, 41012 Sevilla, Spain. Electronic address: aparicio@cica.es.
authors.forename: Ramón
authors.initials: R
authors.lastname: Aparicio
authors.affiliation: Instituto de la Grasa (CSIC), Padre García Tejero 4, 41012 Sevilla, Spain.
authors.forename: Diego L
authors.initials: DL
authors.lastname: García-González
mesh_terms: D005843:Geography; D000069463:Olive Oil / Q000032:analysis*; D013030:Spain; D014131:Trace Elements / Q000032:analysis*
chemical_list: D000069463:Olive Oil; D014131:Trace Elements
keywords: Geographical traceability; Inductively coupled plasma-mass spectrometry; Trace elements; Virgin olive oil