钨精矿化学分析方法 第20部分:汞含量的测定 固体进样直接测定法 Methods for chemical analysis of tungsten concentrates— Part 20：Determination of mercury content— Solid sampling and direct mercury analysis method  ICS  77.120.99 CCS  H 14   中华人民共和国国家标准 GB/T 6150.20—2025 2025-01-2 4发布 2025-08-0 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 引言   ·····································································································   Ⅳ 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     试剂或材料   ···························································································   1 6     仪器设备   ······························································································   2 7     样品   ··································································································   2 8     试验步骤   ······························································································   2      8.1     试料   ······························································································   2      8.2     平行试验   ·························································································   2      8.3     测定   ······························································································   2      8.4     工作曲线的绘制   ·················································································   2 9     试验数据处理   ·························································································   3 10     精密度   ·······························································································   3      10.1     重复性   ··························································································   3      10.2     再现性   ··························································································   3 11     试验报告   ····························································································   3 附录A （资料性）    固体测汞仪推荐的仪器参数   ·······················································   5 附录B （资料性）    精密度试验原始数据   ·······························································   6 GB/T 6150.20—2025     Ⅰ