离子交换富集-导数火焰原子吸收法测定自来水中Cu,Fe和Zn

本文研究了用 2 0 1× 7阳离子交换树脂对自来水中的微量元素进行交换富集 ,采用微量脉冲进样 导数火焰原子吸收法测定富集后溶液中的Cu ,Fe和Zn ,该方法灵敏度分别为 0 2 9,0 5 9和 0 0 6 μg·L- 1 ,精密度分别为 4 2 8% ,1 95 %和 2 2 8% ,检测限分别为 1 2 8,5 85和 0 6 8μg·L- 1 ,回收率分别为 91 13% ,10 1 34%和99 84 % ,本方法大大减少了需样量 ,简便快速 ,灵敏度高。

Determination of Copper, Iron and Zinc in Tapwater by Ion Exchange Microcolumn Preconcentration-derivative Flame Atomic Absorption Spectrometry

A new microsample-pulse method is described for the determination of copper, iron and zinc by ion exchange microcolumn preconcentration-derivative flame atomic absorption spectrometry. The optimum conditions concerning the sensitivity were studied. The method was applied to the determination of Cu, Fe and Zn in tapwater with sensitivity being 0.29, 0.59 and 0.06 microgram.L-1, respectively. The recovery range and the relative standard deviation of the proposed method were 91.13%-101.34% and 1.95%-4.28%, respectively. The detection limits were found to be 1.28, 5.85 and 0.68 micrograms.L-1, respectively. The method is sensitive, accurate, precise and rapid.