Abstract
The authors established a method for estimating the mixing ratios of oil mixtures on the basis of their fatty acid composition data by maximum likelihood estimation. Only mean composition data of pure oil samples were used in the previous method, while variance data are also considered in this method. This method was applied to the binary mixture data of sesame oil and other oil (soybean oil, rapeseed oil and rice bran oil). The positive effect of usage of variance data was confirmed by a verification method, which was also established in this paper.
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