ICP-AES Determination of Germanium in Sn-Ge Intermediate Alloy

Intermediate alloy of tin and germanium was dissolved in HNO3 (1+1) and HCl (1+4) at temperature below 60 ℃,and its germanium content was determined by ICP-AES.Conditions for AES determination were tested and optimized.Flow-rate of carrying gas of 0.6 L·min-1,acidity of ca.2 mol·L-1 HCl of the sample solution,and analytical spectral line of 265.118 nm were selected.Accuracy of analytical results of germanium was affected remarkably by the matrix element of tin due to its enhancement on the analytical signals.The matrix effect of tin was overcome by applying the matrix-matching method in preparation of standard curve.Precision and recovery of the method were tested,giving results of recovery in the range of 96.0%-103.6%,and value of RSD (n=6) of 0.53%.