This standard specifies the method for the determination of tungsten content in platinum alloys. This standard applies to the determination of tungsten content in PtW8 and PtW8.5 alloys. Measuring range: 7% to 10%.
GB/T 15072.17-1994 history
2008GB/T 15072.17-2008 Test method of precious metal alloys.Determination of tungsten contents for platinum alloys.Tungstic acid gravimetry
1994GB/T 15072.17-1994 Platinum alloys-Determination of tungsten content