导数分光光度法的研究——Ⅳ.对乙酰基偶氮羧四阶导数分光光度法测定微量钙

导数分光光度法的研究——Ⅳ.对乙酰基偶氮羧四阶导数分光光度法测定微量钙 INVESTIGATION OF DEVIVATION SPECTROPHOTOMETRY （四）Determination of trace calcium by fourth order devivative spectrophotometry to use carboxylacetylazo 陈璞 first-author 罗庆尧 曾云鹗 在pH为2的EDTA—柠檬酸介质中,对乙酰基偶氮羧与钙形成有色络合物,用于钙的测定,钡有严重干扰。本文根据高阶导数光谱对重叠吸收谱带有较强的分辨率,提出用四阶导数分光光度法测定钡存在下的微量钙,取得较好的结果。 In a pH 2 EDTA-Citrate medium,earboxylacetylazo reacts With calcium forming color complexes using to determine calcium. The interference of barium aild strontium was very serious. Determination of calcium by the fourth order derivative spectrophotometry in the presence of barium. The proposed procedure was applied to determination of trace calcium in high pure hydrochloric acid. 中国科学院科学基金 1986-03-01 2021-04-01 3