活性炭富集火焰原子吸收测定水中痕量铁锰铜镉

Preconcentration of Trace Fe, Mn, Cu and Cd in Water with Charcoal and Determination by Flame Atomic Absorption Spectroscopy

作者研究了铁、锰、铜、镉在活性炭上的吸附行为及pH、温度与活性炭粒度对吸附行为的影响,并建立了富集水中上述离子的方法。用火焰原子吸收法可测定水中低至μg/L水平的铁、锰、铜、镉。本法简便快速,准确再现,其回收率和相对标准偏差(n=6)分别为90％～113％和2.6％～9.9％,适于富集和测定多种水样中的上述金属离子。

The absorption of Fe, Mn,Cu and Cd by charcoal and the influenceof pH, particle size and temperature onabsorption were studied. A mothod for thepreconcentration of these irons in waterwas established, and with flame atomicabsorption spectroscopy a content as lowas μg/L could be determined. The recoveryand the coefficient of variance (n=6) werein the range of 90-113% and 2. 6-9. 9%,res-pectively. The proposed method is simple,rapid, accurate reproducible and suitablefor the preconcentration and determinationof titled metal irons in different kinds ofwater.