Home / Standards / GB/T 223.38-1985 GB/T 223.38-1985 Active Methods for chemical analysis of iron,steel and alloy--The anion-exchange separation-gravimetric method for the determination of niobium content 钢铁及合金化学分析方法 离子交换分离-重量法测定铌量 Standard Type GBT ICS 77.080 CCS H11 Status 现行 Issue Date 1985-07-18 Implementation 1986-06-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A