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Describing chemical singularity of Spanish protected designations of origin of virgin olive oils in relation to oils from neighbouring areas

Authors: Tena, Noelia; Aparicio López, Ramón; García-González, Diego L.;

Describing chemical singularity of Spanish protected designations of origin of virgin olive oils in relation to oils from neighbouring areas

Abstract

[ES] Las denominaciones de origen protegidas (DOPs) han demostrado ser un marco de regulación de éxito para la protección de aceites de oliva vírgenes singulares que tienen propiedades particulares. Sin embargo, en ocasiones, el registro de DOPs nuevas y la demarcación de las áreas geográficas asociadas a ellas se basan en aspectos administrativos más que en datos químicos objetivos. En este trabajo se emplea la composición química de ácidos grasos, hidrocarburos, alcoholes, esteroles y metilesteroles para demostrar las diferencias entre aceites de oliva vírgenes de denominaciones de origen protegidas y los aceites producidos en las áreas circundantes. Se han estudiado tres casos (DOP Estepa, DOP Montoro-Adamuz y Campiña de Jaén) que realmente representan tres situaciones que combinan variaciones de cultivar y de características pedoclimáticas. Se seleccionaron, con el test de Brown-Forsythe, una modificación de ANOVA, los compuestos químicos que mostraban buenas características para la clasificación de muestras, y esta capacidad se comprobó posteriormente mediante análisis de componentes principales. Los aceites de las DOPs Estepa y Montoro-Adamuz mostraron diferencias claras en su composición química, mientras que los aceites producidos en Campiña de Jaén formaron un grupo de muestras que se solapó en gran medida con los aceites de las áreas geográficas próximas, probablemente debido al casi exclusivo monocultivar (Picual) en toda la provincia de Jaén.

[EN] The protected designations of origin (PDOs) have proven to be a successful regulatory framework to protect singular virgin olive oils that have distinctive properties. However, sometimes the registration of new PDOs and the demarcation of the geographical areas associated to them are based on administrative issues rather than objective chemical data. In this work, the chemical compositions of fatty acids, hydrocarbons, alcohols, sterols and methyl sterols have been used to prove the differences between a PDO virgin olive oil and the oils produced in the surrounding areas. Three cases were studied (PDO Estepa, PDO Montoro-Adamuz, and Campiña de Jaén) which actually mean three different situations that combine variations in cultivar and pedoclimatic characteristics. The chemical compounds that showed a better ability to classify samples were selected by the Brown-Forsythe test, a particular modification of ANOVA, and this ability was later visualized in a principal component analysis. The oils from PDOs Estepa and Montoro-Adamuz showed clear differences in their chemical compositions, while the oils from Campiña de Jaén formed a group of samples which greatly overlapped with the oils from surrounding areas, probably due to the lack of variation in cultivar (Picual) throughout the province of Jaén.

This research has been partially funded by the Spanish Ministry of Science and Innovation (Ramón y Cajal Program and AGL2008-01411).

Peer Reviewed

Keywords

Aceite de oliva virgen, Minor compounds, Virgin olive oil, Protected designation of origin, Geographical traceability, Trazabilidad geográfica, Compuestos minoritarios, Denominación de origen protegida

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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