Home / Standards / GB/T 31231-2014 GB/T 31231-2014 Active Determination of zinc and lead isotopic ratios in aqueous solution―Multiple-collectors inductively coupled plasma mass spectrometry 水中锌、铅同位素丰度比的测定 多接收电感耦合等离子体质谱法 Standard Type GBT ICS 71.040 CCS N04 Status 现行 Issue Date 2014-09-30 Implementation 2015-04-15 Responsible Dept 科技部 Drafting Unit N/A