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dc.contributor.authorMelgosa, Manuel-
dc.contributor.authorGómez-Robledo, Luis-
dc.contributor.authorHuertas, Raúl-
dc.contributor.authorCapitán-Vallvey, L. F.-
dc.contributor.authorMoyano Pérez, María José-
dc.contributor.authorHeredia, Francisco J.-
dc.identifier.citationJournal of the American Oil Chemists' Society 86(7): 627-636 (2009)es_ES
dc.description.abstractColor measurements have been performed using eighteen virgin-olive-oil tasting cups with ten different commercial virgin olive oils, positioned in a color cabinet with a D65 source. Three geometries (spectroradiometer tilted 0°, 30°, and 60°) were employed, simulating different positions of the taster’s eye. Our main goal was to test whether traditional blue-tinted cups effectively conceal the color of virgin olive oils, as desired in sensorial analyses. None of the cups employed had all their geometrical dimensions within the standardized values, despite being cups used in official sensorial analyses. Measuring a magnitude similar to the spectral transmittance, we found substantial differences among the glasses of the eighteen tasting cups. Comparing color variability for one virgin olive oil in different tasting cups, and one tasting cup with different virgin olive oils, we discovered that: (1) variability was higher in the case of one virgin olive oil in different cups; (2) in both cases the variability increased with the tilt of the spectroradiometer; (3) even when the variability was lowest (i.e., 0° measurements for two oils in the same cup), the average color difference was above typical visual thresholds in simultaneous comparison experiments. In the most usual case of a successive comparison between two oils in the same tasting cup, it is expected that in most cases tasters will perceive color differences between the oils when their eyes are tilted 60° with respect to the horizontal, but not when they observe the cup in the horizontal direction. In summary, blue-tinted olive-oil-tasting cups reduce, but do not completely conceal, oil color. The use of opaque tasting cups with black walls is suggested.es_ES
dc.description.sponsorshipResearch Project P06-AGR-01744, Consejería de Innovación, Ciencia y Empresa, Junta de Andalucía (Spain), with European Regional Development Fund (ERDF) support.es_ES
dc.publisherAmerican Oil Chemists' Societyes_ES
dc.subjectVirgin olive oil (VOO)es_ES
dc.subjectOil tastinges_ES
dc.subjectColor measurementes_ES
dc.subjectColor differenceses_ES
dc.subjectStandard oil-tasting cupses_ES
dc.titleColor Measurements in Blue-Tinted Cups for Virgin-Olive-Oil Tastinges_ES
dc.description.peerreviewedPeer reviewedes_ES
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