离子交换分离－氢化物原子吸收光谱法测定紫铜中微是量硒

Determination of Micro Amount in Cop-per by Ion Exchange Separation Hydrde Gen-eration Atomic Absorption Spectuometry

采用阳离子交换树脂离子分离铜，发生氢化物原子吸收光谱法测定硒。上柱溶液酸度在０～７％，硒的回收率在９６～１０１％，过柱溶液中铜的浓度低于０．０１μｇ／ｍＬ。方法检出限为５×１０￣（－５）％，分析紫铜中４．４×１０￣（－４）％的硒，相对标准偏差为３％。

method was established for determi-nation of Se in copper by ion exchange sepa-ration hydride generation atomic absorptionspectuometry. The recovery is 96～101%andthe Concentution of residual Cu is Low as0.01%μg/mL in eluate ,The method has beenapplied to the determination of Se Concen-tration of 4.4 × 10￣(-4)%,the RSD is 3%withdete tion Limit is 5 × 10￣(-5)%