Home / Standards / GB/T 223.21-1994 GB/T 223.21-1994 Active Methods for chemical analysis of iron，steel and alloy--The 5-Cl-PADAB spectrophotometricmethod for the determination of cobalt content 钢铁及合金化学分析方法 5-Cl-PADAB分光光度法测定钴量 Standard Type GBT ICS 77.080 CCS H11 Status 现行 Issue Date 1994-01-17 Implementation 1994-10-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A