精製大豆油の色のもどりについて-2-

概要

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Authors observed that the color reversion is very slight in refined and deodorized soybean oil extracted with normal hexane from the 1963 crop of Illinois soybeans. The cause for this may be attributed to a low moisture content of 9.77% (crushed to pass 700 micron sieve and dried to constant weight at 90°C, 30mmHg) of the 1963 crop soybeans which had experienced a draught in the growing and harvesting season.<BR>When the 1963 crop soybeans with a low moisture content of 9.77% is moistend with water to a moisture level of 13.814.0% before extraction, the color reversion becomes conspicuous.<BR>On the contrary, in case domestic soybeans with a high moisture content of 13.8% is dehydrated down to a level of 10.110.3% before extraction, the maximum value of color reversion falls considerably.<BR>Further, we have confirmed that the moisture content of soybeans in the process of cracking and grinding is a more affecting factor for the color reversion of refined and deodorized soybean oil than that in the process of extraction.
日本油化学会の論文