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本文以定量分析水中微量Cu、Zn、Pb、Cd、Mn、Fe、Ni为目的,对401型树脂与原子吸收分光光度法并用的基本条件进行了研究。本方法适用于清洁地面水水质的分析,其定量条件为:氢型树脂2.5克(干重),pH5.5～6,水样交换流速及洗脱液流速分别为2.5～5.0ml/min、3ml/min,以25ml容量瓶定容,试液置于原子吸收分光光度计上测定。用于浑河源头水质背景调查中,水样加标回收率为Cu:101～105％、Pb:110～116％、Zn:98～114％、Cd:94～96％、Mn:95～101％、Fe:97～100％、Ni:96～7％范围内。方法的检测下限为Cu:0.5ng/ml、Pb:1.1ng/ml、Cd:0.1ng/ml、Zn:0.25nmg/ml、Mn:0.7ng/ml、Fe:0.7ng/ml、Ni:0.7ng/ml。
In this paper, the basic conditions for the combination of 401 resin with atomic absorption spectrophotometry were studied for the quantitative analysis of Cu, Zn, Pb, Cd, Mn, Fe and Ni in water. The method is suitable for the analysis of surface water quality. The quantitative conditions are as follows: 2.5 g (dry weight) of hydrogen resin, pH 5.5 to 6, flow rate of exchange of water sample and flow rate of eluant are respectively 2.5-5.0 ml / min, 3ml / min to 25ml volumetric flask capacity, the test solution was placed on the atomic absorption spectrophotometer determination. In the survey of the water quality in the headwater of the Hun River, the recoveries of spiked water samples ranged from 101 to 105% for Cu, from 110 to 116% for Pb, from 98 to 114% for Zn, from 94 to 96% for Cd and from 95 to 101 for Mn %, Fe: 97-100%, Ni: 96-7%. The detection limit of the method was 0.5 ng / ml for Cu, 0.1 ng / ml for Pb, 0.1 ng / ml for Cd, 0.25 nmg / ml for Zn, 0.7 ng / ml for Mn, 0.7 ng / ml for Fe, ng / ml.