摘要
镀锌废酸液具有高铁、高酸、低锌的特性。镀锌废酸液中铁约是锌的10倍,主要以Fe2+形式存在,用H2O2将Fe2+转化为Fe3+,转换率达到100%,且反应体系中不产生新的测定干扰元素。采用氟化钠掩蔽镀锌废酸液中高浓度的Fe3+,解决了Fe3+对EDTA络合滴定测锌的强烈干扰,方法的回收率达到97%以上。用H2O2将镀锌废酸液中高含量的Fe2+全部转换为Fe3+,用碘量法分别测定总铁、Fe3+,其回收率分别为99%、98%以上,通过计算得到Fe2+在镀锌废酸液中的含量。
In zincification waste acid,concentration of iron was high and concentration of zinc was low.The concentration of iron existing in the form of Fe2+ was ten times higher than zinc in zincification waste acid.H2O2 was used to change Fe2+ into Fe3+and the conversion rate was 100% without interference.Fe3+was masked by sodium fluoride solving the interference of Fe3+ to determination of zinc with recovery more than 97%.Fe2+changed into Fe3+by using H2O2,then total iron and Fe3+were determined by using iodimety....
出处
《化学分析计量》
CAS
2009年第1期52-55,共4页
Chemical Analysis And Meterage
基金
上海市科委应用技术开发专项资金项目(06-016)
