饲料中维生素A的测定　高效液相 色谱法 Determination of vitamin A in feeds—High performance liquid chromatography  ICS  65.120 CCS  B 46   中华人民共和国国家标准 GB/T 17817—2024 代替 GB/T 17817－2010 2024-11-2 8发布 2025-06-0 1实施     国家市场监督管理总局 国家标准化管理委员会 发 布 目　　次 前言   ·····································································································   Ⅲ 1     范围   ··································································································   1 2     规范性引用文件   ······················································································   1 3     术语和定义   ···························································································   1 4     第一法　皂化提取法   ·················································································   1      4.1     原理   ······························································································   1      4.2     试剂或材料   ······················································································   1      4.3     仪器设备   ·························································································   2      4.4     样品   ······························································································   2      4.5     试验步骤   ·························································································   3      4.6     试验数据处理   ····················································································   6      4.7     精密度   ···························································································   7 5     第二法　直接提取法   ·················································································   7      5.1     原理   ······························································································   7      5.2     试剂或材料   ······················································································   7      5.3     仪器设备   ·························································································   7      5.4     样品   ······························································································   8      5.5     试验步骤   ·························································································   8      5.6     试验数据处理   ····················································································   8      5.7     精密度   ···························································································   9 附录A （规范性）    维生素A和维生素A乙酸酯标准储备溶液的质量浓度校正方法   ················   10 附录B （资料性）    在线固相萃取阀的切换流程图   ····················································   11 附录C （资料性）    维生素A标准溶液的液相色谱图   ·················································   12 附录D （资料性）    维生素A乙酸酯标准溶液色谱图   ·················································   14 GB/T 17817—2024     Ⅰ