摘要
以对乙酰基偶氮胂(ASApA)为显色剂,建立了钙的分光光度分析新方法。在pH10.0介质中,Ca与ASApA生成1:2(配合比)螯合物,最大吸收波长位于626nm,摩尔吸光系数ε_(max)=1.11×10~4L·mol^(-1)·cm^(-1),Ca量在1~15μg/25ml范围内遵守Beer定律。方法用于水样中痕量Ca测定,得到了满意的结果。
A sensitive spectrophotometric method was developed for the determination of trace calcium using the title reagent as developing reagent. At pH 9.8 to 11.8, Calcium with p—acetylarsenazo forms a complex with maxmium absorption at 626 nm, the composition of the complex is 1:2 (M:R). The apparent molar absorptivity is ε_(max)=1.11×10~4L·mol^(-1)·cm^(-1). Beer's law is obeyed in the range of 1~15μg/25ml. The method has been successfully applied to the practical analysis of water samples with satisfactory results.
出处
《鞍山钢铁学院学报》
1993年第1期1-3,共3页
Journal of Anshan Institute of Iron and Steel Technology
关键词
钙
比色法
显色剂
乙酰基偶氮胂
Calcium, p—Acetylarsenazo, Colour reaction, Spectrophotometry Class No. O657.3