GB/T 6730.37-1986
AbolishedMethods for chemical analysis of iron ores--The 4-[(5-chloro-2-phridyl)azo]-1,3-diaminobenzene photometric method for the determination of cobalt content
铁矿石化学分析方法 4-[(5-氯-2-吡啶)偶氮]-1,3-二氨基苯光度法测定钴量
铁矿石化学分析方法 4-[(5-氯-2-吡啶)偶氮]-1,3-二氨基苯光度法测定钴量