邻菲啰啉在测定亚铁中的保护效果

Protection Effects of Phenanthroline in Determing Ferrous Iron

摘要:

样品在分解过程中 ,亚铁易被空气部分氧化 ,致使测试结果偏低 ,采用在HF H2 SO4溶矿过程中加入邻菲卟罗啉 ,与亚铁形成络合物 ,对保护亚铁具有较好的效果。拟定了在塑料坩埚中加邻菲卟罗啉、H2 SO4及HF ,中高温电热板溶矿 ,容量法测定样品中的亚铁 ,方法精密度为 0 .2 3% ,样品加标准回收率 98.8%～ 10 1.9%。此方法具有较好的应用效果

Abstract:

Using phenanthroline to protect samples, HF-H 2SO 4 to solute minerals, volume analysis method to determine ferrous iron, some results are gained as follows: the precision is 0.23%, and extraction ratio of standard substance in samples is 98.1%～101.9%. Through standard sample test, the method is correct and reliable.