Simultaneous determination of gold and silver in blister copper by inductively coupled plasma atomic emission spectrometry

Blister copper sample were dissolved in mixed acid of hydrochloric acid and nitric acid.Gold and silver content was determined directly by inductively coupled plasma optical emission spectrometry(ICP-OES) by using 242.794 nm and 328.068 nm as analyzing spectral line.Investigation of the effects of matrix and co-existing ions were studied.It was shown that copper had certain effect on the determination,but can be removed by matrix-matching,while other impurity elements had no influence.The method has been applied to the blister copper and the results are consistent with the results by the method of YS/T521.2-2009,with the relative standard deviations of gold and silver(RSD,n=12) smaller than 1.9 % and 1.1 % respectively.In addition,the recoveries of testing elements were between 95 % and 105 %.