液膜预富集测定高纯硝酸银中痕量铜、铁和铅  

DETERMIANATION OF TRACE COPPER,IRON AND LEAD IN PURIFIED AgNO 3 WITH LIQUID MEMBRANE ENRICHMENT

作　　者：于惠芬[1] 李红玫[1] 徐书绅[1] 马玲莉 刁开胜[1] 

机构地区：[1]长春师范学院化学系

出　　处：《光谱学与光谱分析》1997年第6期76-79,共4页Spectroscopy and Spectral Analysis

基　　金：有色系统高校科研基金

摘　　要：建立了液膜预富集结合火焰原子吸收法测定硝酸银中微量铜、铁和铅的新方法。高纯硝酸银中的这些微量杂质被流动载体Ｐ２０４迁移至内相ＨＮＯ３溶液中，８ｍｉｎ后ＨＮＯ３溶液中该种离子的浓度将提高约２５倍，可直接用火焰原子吸收法测定。回收率在９５％以上。基体银不干扰测定，精密度与灵敏度均能满足要求。In this paper a new method of preconcentrating microimpurity Cu,Fe and Pb in high pure AgNO 3 using emulsion liquid membrane technique was developed for FAAS determination The enrichment multiple was 25,recoveries were over 95% Matrix silver does not interfere enrichment and determination

关 键 词：液膜法 铜、铁、铅 硝酸银 火焰原子吸收法 

分 类 号：TQ572.1[化学工程—精细化工]