Estimation of the Mixing Ratios of Edible Oil Mixtures by Maximum Likelihood Method.

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  • YAMAMOTO Hiromichi
    National Institute of Agro-Environmental Sciences, Ministry of Agriculture, Forestry and Fisheries National Agriculture Research Center, Ministry of Agriculture, Forestry and Fisheries
  • YAMAZAKI Megumi
    National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries
  • NAGAO Akihiko
    National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries
  • ISHIMA Toshio
    Hokuriku National Agricultural Experiment Station, Ministry of Agriculture, Forestry and Fisheries

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Other Title
  • 最尤法による食用油脂の混合率推定
  • Estimation of the Mixing Ratios of Edib

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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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