【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 )更多还原

【Abstract】 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)更多还原