Home / Standards / GB/T 20189-2025 GB/T 20189-2025 Active Determination of β-receptor agonists in feeds—Liquid chromatography-tandem mass spectrometry 饲料中β-受体激动剂的测定 液相色谱-串联质谱法 Standard Type GBT ICS 65.120 CCS B46 Status 现行 Issue Date 2025-06-30 Implementation 2026-01-01 Responsible Dept 国家标准委 Drafting Unit N/A