El-Nockrashy A S, Zaher F A, Osman F
Nahrung. 1976;20(2):117-24. doi: 10.1002/food.19760200202.
The selectivity of hexane isomers towards cottonseed pigments and colour fixed pigments was illustrated by using spectrophotometric analysis of crude, refined and bleached oils, and by refinability and bleachability criteria. Crude cottonseed oil contains besides the alkali-refinable gossypol and gossypurpurin, several colour fixed pigments. Anhydrogossypol, gossyfulvin, anthocyanins and carotenoids seem to be responsible for the colour-fixation of the oil. Only carotenoids are eliminated by bleaching. Selectivities of hexane isomers towards colour fixed pigments are in the following order: isohexane less than n-hexane less than cyclohexane less than benzene less than methylcyclopentane.
通过对毛油、精炼油和脱色油进行分光光度分析，并依据可精炼性和可脱色性标准，阐述了己烷异构体对棉籽色素和固色色素的选择性。粗棉籽油除了含有可碱炼的棉酚和棉籽紫之外，还含有几种固色色素。脱水棉酚、棉籽黄、花青素和类胡萝卜素似乎是造成该油颜色固定的原因。只有类胡萝卜素可通过脱色去除。己烷异构体对固色色素的选择性顺序如下：异己烷＜正己烷＜环己烷＜苯＜甲基环戊烷。
