【摘要】 本文提出在NaOH-NH₃·H₂O或NH₃·H₂O介质中,可采用Fe（OH）₃共沉淀法富集Cu、Zn、Ni及其化合物中的微量钙,用离心分离法分离基体元素后,再以对乙酰基偶氮羧光度法测定。方法分离手续简便,测定快速准确,标准加料回收试验的回收率在96—100.7%之间,试样分析的相对标准偏差<±3.2%（6—9次测定）。更多还原

【Abstract】 A new method for the spectrophotometric determination of trace calcium in Cu, Zn, Ni and their compounds has been developed. Trace Calcium is separated from matrix and concentrated by centrifugalzation, and then determined spectrophotometrically. This method has been used for analysis of real sample with satisfactory results. The coefficient of varation (6-9 determinations) is less than 3.2%. The recovery was 96-100.7%.更多还原