イドン酸およびグルコン酸の定量法-1・2-
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概要
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A method for the determination of idonate and gluconate in the reduction product of calcium 5-ketogluconate has been developed. Idonate and gluconate form complexes with molybdate and borate to give a change in their optical rotation and other physical properties. For the determination, optical rotatory power was measured under the following two conditions : (A) In 0.35<I>M</I> diammonium molybdate with 18% acetic acid, 0.010.05<I>M</I> idonate gives [M]<SUP>25°</SUP><SUB>D</SUB>-577° (<I>M</I><SUP>-1</SUP>m<SUP>-1</SUP>) and 0.010.15<I>M</I> gluconate gives 748°, (B) In 0.05<I>M</I> borax, 0.010.25<I>M</I> idonate gives [M]<SUP>25°</SUP><SUB>D</SUB> 38.6 and 0.010.15<I>M</I> gluconate gives 58.8°. The determination takes only 10 min. for a sample. The accuracy was about 1%.
- 社団法人 日本分析化学会の論文
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