痕量银的液膜富集与原子吸收法测定  

Liquid Membrane Enrichment of Trace Silver and Its Determination by Flame Atomic Absorption Spectrophotometry

作　　者：于惠芬[1] 孙桂清 

机构地区：[1]长春师范学院,长春130032 [2]长春市实验中学,长春130051

出　　处：《分析试验室》2000年第3期28-30,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了分离与富集痕量银的液膜条件 ,摸索出一种新的液膜体系 TOA-N2 0 5 -煤油 -NH3·H2 O,提出了最佳富集条件。经 5次提取分离 ,富集倍数可达82倍 ,回收率在 98%以上。与火焰原子吸收法相结合 ,可测 ng/m L级的 Ag+。此法用于富集地质标样中的痕量银 ,相对标准偏差为 2 .4% (n=10 )The conditions of separation and enrichment for trace silver were studied.A new liquid membrane system of TOA N205 Kerosine NH 3·H 2O was setup and optimuzed.The recoveries over 98% and enrichment of 82 fold were obtained.Ag+ at ng/mL level could be enriched selectively and determined by FAAS.The method were applied to the enrichment of trace silver in geological samples with satisfactory results ,the relative standard deviation is 2.4% (n=10)

关 键 词：液膜富集 火焰原子吸收法 银 地质样品 

分 类 号：O614.122[理学—无机化学] O575.4[理学—化学]