植物性油脂のX線回折による固体含有量と回折図形の温度変化

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The X-ray diffraction patterns of vegetable fats, such as hydrogenated coconut oil, hydrogenated rape seed oil, palm oil and cacao butter, were determined with a sample cell at various temperatures, which was regulated by thermomodule near a room temperature. (Fig.-1.1) It has been found that hydrogenated coconut oil, hydrogenated rape seed oil and palm oil exhibit β form after heat treatment such as in S. F.I. determination. The authors attempted to determine the solid content from the X-ray diffraction pattern, by dividing it into two parts; the one was scattered by crystal phase (solid phase) and the another by liquid phase. (Fig.-6) Thereafter, it was found that the solid content can be estimated by ratio of two peak intensities, (I2θ=23, 1/I2θ=18.1). These methods could be used for the measurement of solid content. (Fig.-8·1, 8·2) Although polymorphism of cacao butter was very complicated, the X-ray diffraction pattern at various stages can be easily obtained by the use of the sample cell. (Fig.-9, 10)
社団法人日本油化学会の論文