Home / Standards / GB/T 3654.1-1983 GB/T 3654.1-1983 Active Methods for chemical analysis of ferroniobium--The paper chromatograph-gravimetric method for the determination of niobium and tantalum content 铌铁化学分析方法 纸上色层分离重量法测定铌、钽量 Standard Type GBT ICS 77.100 CCS H11 Status 现行 Issue Date 1983-05-02 Implementation 1984-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A