2006YS/T 372.16-2006 Methods for elementary analysis of precious alloy. Determination of gallium content. EDTA complexomeric titration
1970YS/T 372.5-1994 Methods for elementary analysis of precious alloy. Determination of copper content in PtCu alloy. EDTA complexometric titration
YS/T 372.5-1994 Methods for elementary analysis of precious alloy. Determination of copper content in PtCu alloy. EDTA complexometric titration was changed to YS/T 372.16-2006 Methods for elementary analysis of precious alloy. Determination of gallium content. EDTA complexomeric titration.