【摘要】 本文叙述一种离子选择电极同时测定二种不同离子的分析技术——离子选择电极互参电位法的基本原理,计算公式和操作技术,并用于同时测定煤粉中的F^-和Cl^-,熔剂为Na₂CO₃-MgO-KNO₃三元混合物。Br^-的干扰可加入AgCl粉末除去。方法简便。样品分析的相对标准偏差<±5％。更多还原

【Abstract】 The basic principle, calculating formulas and analytical technique of ISE mut ual reference potentiometry were given. Fluoride and chloride in coal powder were simultaneously determined by demonstration, in which Na₂C0₃-MgO-KNO₃ mixture was used as flux, and 3% sodium citrate（pH=6. 0）as TISAB. The determination of fluoride acid chloride was not affected by the common impurities in coal powder. The interference of bromide could be eliminated with the addition of AgCl. The proposed method was simple and rapid without any chemical separation, The precision was better than 5%.更多还原