GB/T 223.12-1991
AbolishedMethodsfor chemical analysis of iron，steel and alloy--The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content
钢铁及合金化学分析方法 碳酸钠分离-二苯碳酰二肼光度法测定铬量
Application Summary AI generated
This standard specifies a photometric method for determining chromium content in iron, steel, and alloys by first separating chromium using sodium carbonate, then reacting it with diphenyl carbazide to form a colored complex. It is applied in metallurgical laboratories and quality control settings for analyzing chromium levels in ferrous materials, particularly when high accuracy is needed for alloy composition verification or product certification.
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