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Composición de tocoferoles en aceite de semilla de sésamo: indicativo de adulteración Este trabajo examina la importancia de los tocoferoles en la detección de la adulteración del aceite de sésamo comercializado en Brasil. Se analizaron cinco muestras a las que se le determinaron su composición en ácidos grasos, esteroles y tocoferoles. Una de las muestras se reveló puro aceite de semilla de sésamo; en otra, todos los parámetros estaban en desacuerdo. En las demás, el perfil de ácidos grasos caracterizaba el aceite de sésamo, sin embargo los tocoferoles y esteroles permanecieron en desacuerdo. Los resultados indican adulteración con otros aceites vegetales como soja, aceites láuricos y maíz.

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The aim of this study was to characterize the Bombacopis glabra nut oil (Malvaceae-Bombacoideae) by the determination of its lipid content and fatty acid composition with emphasis on the cyclopropenoid fatty acids (CPFA). The lipids were obtained by five different extraction conditions:[raw almonds: maceration with ethyl ether (I-MA) and n-hexane (II-MA), both at room temperature, and Soxhlet extraction with hexane for 6 (III-MA) and 12 h (IV-MA) and toasted almond: maceration with hexane at room temperature (V-MA)]. Additionally, the oxidation stability of oil by the Rancimat test and the boiling point by thermal analysis (technical TG / DTG) were evaluated. The oil content ranged from 34.99 (I-MA) to 47.36% (IV-MA); oxidation stability was 4.18 h and the boiling point was 373.37 ℃. It should be noted that results about thermal and oxidative stability are been reported for the first time with respect to Bombacopis glabra nut oil. The major oil constituents were palmitic acid (56.06%) and estercúlico (24.83%). The high percentage of CPFA oil, determined by NMR 1 H (26.2 to 30.9%) and GC-FID (26.5%), reinforce that the kernels of this species are not suitable for human consumption.