Direct Determination of Copper,Bismuth,Antimony,Lead,Iron,Selenium,Tellurium and Palladium in Rough Silverby ICP-AES Method
In this paper,the method of simultaneous determination of impurity elements in crude silver by ICP-AES was studied.The sample was decomposed with nitric acid and hydrogen peroxide,and tartaric acid is used as a masking agent.The appropriate analysis line and optimal instrument analysis conditions were determined,and silver matrix with a concentration of 2.5 mg/mL and below did not interfere with the determination.The detection limit of impurity elements were 0.002～0.013 μg/mL.The RSD(n=7)is 0.50％～9.4％,and the recovery rate is 95％～108％.It can directly determine copper,bismuth,antimony,lead,iron,selenium,tellurium,and palladium in crude silver with a content greater than 0.001 0％.
万方数据
维普
