摘要
用在线富集进样火焰原子吸收法测定水中低含量Ｃｕ、Ｐｂ、Ｃｄ，富集倍数分别为１２２、１３６和９４倍，相对标准差为１６％、１５％和４６％（ｎ＝１１），检测限（２σ）为１６μｇ／Ｌ、１５μｇ／Ｌ和０１８μｇ／Ｌ。地面水样中加标回收率为９０％～１０６％，９４％～１０３％和１０６％～１１８％。探讨了分析精密度差的原因；改进了富集进样方法。
Trace Cu, Pb and Cd were determined by flame AAS with on line concentrator to
atomizer. Concentration ratio 122,136 and 94 Standard deviation were 16%,15% and 4
6%(n=11). Detection limit(2σ) were 1 6 μg/L,1 5 μg/L and 0 1 μg/L. Recoveries with
surface water samples were 90%～106%,94%～103% and 106%～118%. The paper also
discussed the source of poor precision and presented ways of proving concentration.
出处
《环境监测管理与技术》
1999年第1期35-36,共2页
The Administration and Technique of Environmental Monitoring
关键词
原子吸收法
低含量
水质监测
金属元素
Flame AAS On line concentration Flow injection Cu, Pb and Cd Trace
