GB/T 1819.9-2004 Methods for chemical analysis of tin concentrates Determination of tungsten trioxide content-The thiocyanate spectrophotometric method (English Version)
This standard specifies the determination method of tungsten trioxide content in tin concentrate. This standard applies to the determination of tungsten trioxide content in tin concentrate. Measuring range: 0.020% to 25.00%.
GB/T 1819.9-2004 history
2017GB/T 1819.9-2017 Methods for chemical analysis of tin concentrates—Part 9:Determination of tungsten trioxide content—The thiocyanate spectrophotometric method
2004GB/T 1819.9-2004 Methods for chemical analysis of tin concentrates Determination of tungsten trioxide content-The thiocyanate spectrophotometric method
1979GB/T 1828-1979 Determination of tungsten trioxide content in tin concentrates--Thiocyanate photometric method
GB/T 1819.9-2004 Methods for chemical analysis of tin concentrates Determination of tungsten trioxide content-The thiocyanate spectrophotometric method has been changed from GB/T 1828-1979 Determination of tungsten trioxide content in tin concentrates--Thiocyanate photometric method.