Determination of Cu,Mn,Mg and Sr content in Si-Al-Ca-Ba alloy by inductively coupled plasma-atomic emission spectrometry(ICP-AES)

The present paper studied the method of determine Cu,Mn,Mg,Sr content in Si-Al-Ca-Ba alloy by inductively coupled plasma-atomic emission spectrometry(ICP-AES).The sample was firstly dissolved in the nitric acid and hydrofluoric acid and then the fluorine in the sample was removed by fuming with perchloric acid.After dissolution in hydrochloric acid and a small amount of salt water,the contents of Cu,Mn,Mg,Sr elements in the sample were determined by ICP-AES.The experimental conditions such as the dissolution of sample,the analytical spectral lines and the matrix interference as well as the correctness and accuracy of measurement and the reclamation of the waste were investigated.The results shows that when the element content was in the range from 0.020 % to 0.500 % the relative standard deviations were less than 1.17 % and the reclamation rate was in the range of 96.8 %～102.5 %.The method was easy and fast and has been applied to daily analysis and determination of standard reference materials.