Home / Standards / GB/T 31311-2014 GB/T 31311-2014 Active Metallurgical-grade fluorspar―Determination of lead content―Solvent extraction atomic absorption spectrometric method 冶金级萤石 铅含量的测定 溶剂萃取原子吸收光谱法 Standard Type GBT ICS 73.080 CCS D52 Status 现行 Issue Date 2014-12-05 Implementation 2015-09-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A