机构地区: 河南工业大学
出 处: 《中国粮油学报》 2011年第3期100-104,109,共6页
摘 要: 研究了皂化法、薄层色谱法及棒状薄层色谱-氢火焰离子化检测器(TLC-FID)法检测食用油脂中的矿物油。结果表明:皂化法简便、快捷,最低检测限可达0.5%,但不适用于本身含蜡质的食用油脂(如米糠油、玉米油及葵花油等);薄层色谱法(TLC)同样可对食用油脂中的矿物油进行定性检测,最低检测限可达到0.2%左右,但仍不适用于本身含蜡质的食用油脂;TLC-FID法克服了以上两种方法的缺陷,不仅适用于本身不含蜡质的食用油脂,还可对本身含蜡质的食用油脂进行矿物油的定性检测,不会出现误检,相比之下更具有优越性。 Determinations of mineral oil in edible oils and fats by using the saponification method, thin layer chromatography ( TLC ), and thin layer chromatography - flame ionization detector ( TLC - FID) were compared. Resuits: The saponification method is simple ,fast,and its detection limit is 0.5% ; thin -layer chromatography (TLC) can also determine qualitatively the existence of mineral oil in edible oils and fats with a detection limit of 0.2%, but neither the saponification method nor TLC is practical for edible oils and fats, which contain wax. Thin layer chroma- tography - flame ionization detector ( TLC - FID) overcomes the disadvantage of above two methods. Whether contain wax or not, the existence of mineral oil in oils and fats can be detected with the TLC - FID method, and wrong judg- ment can be avoided.