火焰原子吸收光谱法测定废定影液中银含量

Determination of silver content in waste fixative by flame atomic absorption spectrometry

摘要:

用硝酸与盐酸处理废定影液样品，可将样品中的硫代硫酸络合物与离子完全分解．加入氨水、银和氨生成很稳定的银氨络离子，用原子吸收分光光度法测定废定影液中的银含量．方法的相对标准偏差小于3，，加标回收率96．2，～102．4，．

Abstract:

In this study ,under the treatment of nitric acid and hydrochloric acid ,thiosulfate complex and ion in the waste fixer samples were completely decomposed .The adding of aqueous ammonia ,silver ,and ammonia generated very stable silver ammonia complex ion .To determine silver content in waste fixative , the atomic absorption spectrophotometric method was used .The relative standard deviation of this method was less than 3， and the standard addition recoveries were between 96 .2， -102 .4， .