Home / Standards / GB/T 42957-2023 GB/T 42957-2023 Active Determination of lysine, methionine and threonine in commercial amino acid products and additive premixture feeds 氨基酸产品和添加剂预混合饲料中赖氨酸、蛋氨酸和苏氨酸含量的测定 Standard Type GBT ICS 65.120 CCS B46 Status 现行 Issue Date 2023-08-06 Implementation 2024-03-01 Responsible Dept 国家标准委 Drafting Unit N/A