GB/T 223.12-1991 Methods for chemical analysis of iron,steel and alloy--The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content (English Version)
This standard specifies the determination of chromium content by sodium carbonate separation-diphenylcarbazide photometry. This standard applies to the determination of chromium in carbon steel, low alloy steel and precision alloys. Measuring range: 0.005% to 0.500%.
GB/T 223.12-1991 history
1991GB/T 223.12-1991 Methods for chemical analysis of iron,steel and alloy--The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content