氢化物原子吸收光谱法测定水体中痕量铅

Determination of Trace Amounts of Pb in Water by Hydride Generation-aas

采用火焰加热Ｔ型石英管原子化器氢化物—原子吸收光谱法测定水体中痕量铅，以草酸作抑制铜、铁等共存元素的干扰，铁氰化钾作氧化剂，在２８３．３ｎｍ测得铅的特征灵敏度＜０．１ｎｇ／ｍｌ１％吸收，测定铅浓度为０．００４ｐｐｍ的水体，相对标准偏差为５．６３％。

A method for determination of trace amounts of Pb in water by hydride generation-atomic absorption spectrometry with a flame heated quartz tube atomazator is described in this paper.Interference of some co-existing elements, such as Cu, Fe etc, can be eliminated by the oxalic acid. Potassium ferricyanide is chosen as the oxidizing agent. The characteristic sensitivity obtained for Pb is <0.1ng / ml 1% absorption at 283.3nm. Relative standard deviation is 5.63% for the determination of 0.004ppm Pb.