This standard specifies the method for the determination of indium content in gold alloys. This standard applies to the determination of indium content in AuNiIn9-8 alloy. Measuring range: 7% to 10%.
GB/T 15072.9-1994 history
2008GB/T 15072.9-2008 Test method of precious metal alloys.Determination of indium content for gold alloys.Complexometric return titration using EDTA