Determination of Copper in Silver Copper Alloys by ICP-AES

The content of copper in silver copper alloys was determined by inductively coupled plasma atomic emission spectrometry(ICP-AES). Accurately measured 0. 1000 g copper and silver alloy samples in erlenmeyer flask,added 5 m L nitric acid(P = 1. 42 g·m L-1),after waiting for the completion of the reaction,added a little water,and a certain concentration of hydrochloric acid solution,silver precipitation precipitated,after filter and volume,selected wavelength Cu327. 396 nm,the copper content was determinate according to rated working conditions on the machine.The detection limit was 0. 01 mg / L,the precision(RSD) control was less than 1. 0%,recovery rate was 97% ~ 103%,five homemade samples were measured(n = 10) and the results conformed to the requirements.