Properties and minor constituents were examined for soybean oils obtained from soy-beans with various moisture contents. Yields of crude oils by extraction process of experi-mental scale and tocopherol content in the extracted oil were found to be correlated to the moisture content in soybeans (moisture range, 8-18%). When moistened raw soybeans (moisture 18%) are dried (moisture 8%), the tocopherol content in the extracted crude oil from the dried beans increased. This phenomenon can be observed only in the case of drying whole beans and not in the case of drying crushed raw soybeans. When soybeans with ordinary moisture (moisture 13%, tocopherol 1.25mg/g) are dried to reduce the moisture to 1.9%, the tocopherol content in the extracted crude oil increases (1.90mg/g), but it decreases (0.33mg/g) again when the dried soybeans are moistened (moisture 18%).
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Komoda et al. (1966) studied this question.