On the Extraction Rate of Tocopherols Using Various Solvents:Approach to the More Rapid Determination of Tocopherols

概要

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An experiment on the rate of extraction of tocopherols from the ethanol solution and the mixture of methyl esters of fatty acids containing tocopherols was conducted with eight kinds of solvents.<BR>Among them, benzen and isopropyl ether were superior in the rate of extraction of tocopherols. When benzen or isopropyl ether was adopted as the solvent, even in case of once extraction using a centrifuge tube, the rate of extraction of tocopherols from the mixture of methyl esters of fatty acids reached approximately to 100 percent except the low recovery of 78 percent in δ-tocopherol extracted with benzen.<BR>It is suggested that isopropyl ether should be adopted as the solvent to obtain the detailed amounts of each fractions of tocopherols respectively, in spite of the characteristic which isopropyl ether is more liable to be emulsified compared with benzen. However, it is also considered that benzen is the adequate solvent to extract tocopherols, if one can connive at the somewhat low recovery of δ-tocopherol because of its low biological activity.
公益社団法人日本栄養・食糧学会の論文