GB/T 15072.9-2008 Test method of precious metal alloys.Determination of indium content for gold alloys.Complexometric return titration using EDTA (English Version)
This part specifies the method for the determination of indium content in gold alloys. This section applies to the determination of indium content in AuNiIn alloy. Measuring range (mass fraction): 7% to 10%.
GB/T 15072.9-2008 Referenced Document
YS/T 371 Methods for chemical analysis of precious metals alloys. General rules and regulations
GB/T 15072.9-2008 history
2008GB/T 15072.9-2008 Test method of precious metal alloys.Determination of indium content for gold alloys.Complexometric return titration using EDTA