农产品水溶性提取物中金属离子 消除方法　离子交换法 Metal ions removal in water soluble extracts of agricultural products— Ion exchange method  ICS  65.020.01 CCS  B  00/09   中华人民共和国国家标准 GB/T 44969—2024 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     原理   ··································································································   1 5     试剂和材料   ···························································································   1      5.1     溶液配制   ·························································································   1      5.2     材料   ······························································································   2 6     仪器和设备   ···························································································   2 7     操作步骤   ······························································································   2      7.1     溶解与过滤   ······················································································   2      7.2     离子交换树脂预处理   ·············································································   2      7.3     离子消除   ·························································································   3      7.4     离子交换树脂再生   ···············································································   3 GB/T 44969—2024     Ⅰ