GB/T 4325.21-1984 Methods for chemical analysis of molybdenum--The diphenylcarbazide photometric method for the determination of chromium content (English Version)
This standard applies to the determination of chromium content in molybdenum powder, molybdenum bar, molybdenum trioxide and ammonium molybdate. Measuring range: 0.0002 to 0.015%.
GB/T 4325.21-1984 history
2013GB/T 4325.19-2013 Methods for chemical analysis of molybdenum.Part 19:Determination of chromium content.Diphenylcarbazide spectrophotometry
1984GB/T 4325.21-1984 Methods for chemical analysis of molybdenum--The diphenylcarbazide photometric method for the determination of chromium content
GB/T 4325.21-1984 Methods for chemical analysis of molybdenum--The diphenylcarbazide photometric method for the determination of chromium content was changed to GB/T 4325.19-2013 Methods for chemical analysis of molybdenum.Part 19:Determination of chromium content.Diphenylcarbazide spectrophotometry.