摘要
本文提出了在碱性介质中,基于Ag(I)-phen-TPPS_4配合物的生成而建立高灵敏度测定Ag(I)的分光光度法。配合物的最大吸收波长为438nm,摩尔吸光系数为136×10~5L.mol^(-1).cm^(-1)。Ag(I)的浓度在0～0.4μg/mL范围内符合比尔定律。Ag(I)的最低检出限为8.8ng/mL。配合物的组成为Ag(I):phen:TPPS_4=1:2:1。方法简便、快速,应用于生产感光乳胶的废水中微量银的测定,获得较满意的结果。
A highly sensitive spectrophotometric method has been developed for the determination of microamounts of silver, based on the formation of Ag(Ⅰ)-Phen-TPPS_4 complex in alkaline aqueous solution. The molar absorptivity of the complex of 1.36×10~5 L·mol^(-1)·cm^(-1) is obtained at 438nm. Beer's law is obeyed in the concentration range of 0 to 0.4μg/ml of silver. The detection limit is 8.8ng/ml. The composition ratio of Ag(Ⅰ)/Phen/TPPS_4 is 1:2:1. This method is simple and rapid, and has been used to the determination of silver in wastewater from the factory producing light-sensitive emulsion.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第3期204-207,共4页
Chinese Journal of Analytical Chemistry
关键词
银
邻二氮菲
对磺基苯卟啉
显色
Spectrophotometry
Determination of silver
α,β,γ,σ-Tetra (4-sulfophenyl) porphine
