脂肪酸誘導体に関する研究-1-共役ジエン酸の定量

概要

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Usual GLC and UV methods were examined for determination of conjugated diene content in fatty acid derivatives. Of the two methods the conjugated diene values obtained from GLC agreed well with the known concentration in good correlation, while the UV method did not agreed so well. An equation; c2= (k2/110) ×100=0.91 k2; is presently applied for determination of conjugated dienoic acid in the UV method, whereas according to the authors' experimented results a good agreement could be obtained by the use of a modified equation; c2=1.12k2; in fair correlation to the known concentration samples. (Where, k2 is absorptivity at 233mμ and is found from k2=k223-k0, where k0 is the one which is corrected for absorptions otherwise from conjugated acid such as carbonyl radical, wherein k0 is 0.07 for esters and 0.03 for fatty acids and soaps.) From the above experimented results good agreement could be seen in the UV method, too, as well in the case of GLC in the preciseness for determination of conjugated dienoic acid derivatives.
日本油化学会の論文