Quality Evaluation of Edible Oils by Proton Nuclear Magnetic Resonance Measurement.
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概要
- 論文の詳細を見る
<SUP>1</SUP>H-nuclear magnetic resonance (NMR) method using dioxane as the external proton standard was established to evaluate the quality of edible oils. The number of olefinic protons (OP) in oil was determined by the ratio of the integral value of olefinic protons (δ<SUB>H</SUB> 5.33-5.47) versus that of methylene protons of dioxane (δ<SUB>H</SUB> 3.4-3.5) using the solvent system of benzene-<I>d</I><SUB>6</SUB>-30% MeOD (60°C). In this solvent system, good separation between the olefinic and methine protons from the triglyceride backbone was achieved. As a result, for various UV-irradiated oxidized rapeseed oils, the plots of the OP versus the iodine value and the plots of the number of divinylmethylene protons versus the 2-thiobarbituric acid value gave excellent linearity. In addition, the iodine values calculated by the proposed <SUP>1</SUP>H-NMR method for five commercially available edible oils agreed with the experimental ones within ±3 iodine value error.
- 社団法人 日本食品科学工学会の論文
著者
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Osajima Yutaka
Department Of Bioresources And Biosciences Hiroshima Prefectural University
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Matsui Toshiro
Department Of Applied Chemistry Faculty Of Engineering Doshisha University
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Iwasaki Hiroko
Department Of Cell Differentiation The Sakaguchi Laboratory Of Developmental Biology Keio University
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Matsumoto Kiyoshi
Department Of Applied Chemistry Faculty Of Engineering Kanagawa University
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MATSUI Toshiro
Department of Food Science and Technology, Faculty of Agriculture, Kyushu University
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