Determination of Gold Content in Crude Silver by ICP Spectroscopy

XU Jianying; YANG Shaobo; DING Zhichao; HUANG Xintao; YANG Jinpeng; WEN Yongkun

Abstract：This paper proposes an analytical method for testing the gold content in rough silver using ICP spectroscopy.The effects of analytical lines,instrument power,gas flow,titration acidity,residual silver content,and coexisting elements on the detection results were examined in detail.The results show that the gold analytical line should be selected as 242.7 nm,the instrument power should be 1 150 W,the gas flow should be 0.50 L/min,the titration acidity(hydrochloric acid)should be 10%,and the residual silver content should be≤20 mg/L.When there are 11 interfering elements(copper,iron,lead,bismuth,antimony,selenium,tellurium,platinum,tin,zinc,and palladium)in the solution with a concentration of 100 μg each and the concentrations of each interfering element are 100 μg,200 μg,and 300 μg,there is no significant effect on the determination of 100 μg gold;when the concentrations of each interfering element are 500 μg,1 000 μg,and 1 500 μg,there is no significant effect on the determination of 500 μg gold.The recovery rate of the method is 97.55%-103.67%,and the relative standard deviation of repeatability is 1.18%-2.76%.It has good accuracy and precision.