Home / Standards / GB/T 6730.30-1986 GB/T 6730.30-1986 Abolished Methods for chemical analysis of iron ores--The diphenyl carbazide photometric method for thedetermination of chromium content 铁矿石化学分析方法 二苯基碳酰二肼光度法测定铬量 Standard Type GBT ICS 73.060 CCS D31 Status 废止 Issue Date 1986-08-19 Implementation 1987-08-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A