14 research outputs found

    Estudios sobre la fijaci贸n de color de aceite de semilla de algod贸n, madura, inmadura y da帽ada

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    Oil was extracted from mature, inmature and damaged cottonseed with the acetone-hexane-water azeotrope (53:44:3 by volume). Mature cottonseed oil (M), 10% immature cottonseed oil in mature cottonseed oil (MIM) and 10% damaged cottonseed oil in mature cottonseed oil (MD) were subjected to some treatments e.g. refining and bleaching or the addition of sodium silicate before refining and bleaching or before colour fixation. The treated oils were spectrophotometrically studied. The presence of 10% oil from immature or damaged cottonseed in oil from mature cottonseed produced an increase in the colour and absorption spectra of most samples, resulting in an oil that could not be refined and bleached satisfactorily. Sodium silicate proved to be an effective treatment before refining and colour fixation of the oils. The study revealed gossypol pigments, carotenoids and chlorophylls present in different M, MIM and MD samples.Se extrajo aceite de semilla de algod贸n madura, Inmadura y da帽ada con el azeotropo, acetona-hexano-agua (53:44:3 v/v/v). Se sometieron a diversos tratamientos tales como refinaci贸n y decoloraci贸n, silicato s贸dico antes de la refinaci贸n y decoloraci贸n o antes de la fijaci贸n de color, a aceite de semilla de algod贸n madura (M), 10% de aceite de semilla de algod贸n inmadura en aceite de semilla de algod贸n madura (MIM) y 10% de aceite de semilla de algod贸n da帽ada en aceite de semilla de algod贸n. madura (MD). Los aceites tratados se estudiaron espectrofotom茅tricamente. La presencia de un 10% de aceite de semilla de algod贸n inmadura o da帽ada con aceite de semilla de algod贸n madura produjo un incremento en el color y en el espectro de absorci贸n de la mayor铆a de las muestras, as铆 ocurri贸 en un aceite que no pudo ser refinado y decolorado satisfactoriamente. El tratamiento con silicato s贸dico result贸 efectivo antes de la refinaci贸n y fijaci贸n del color de los aceites. El estudio revel贸 la presencia de pigmentos gosipol, carotenoides y clorofilas en diferentes muestras M, MIM y MD
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