Home / Standards / GB/T 17819-2017 GB/T 17819-2017 Active Determination of vitamin B12 in additive premix—High performance liquid chromatography 添加剂预混合饲料中维生素B12的测定 高效液相色谱法 Standard Type GBT ICS 65.120 CCS B46 Status 现行 Issue Date 2017-11-01 Implementation 2018-05-01 Responsible Dept 国家标准委 Drafting Unit N/A