火焰原子吸收光谱法测定铜原矿尾矿中的镉

Determination of Cadmium in Copper Original Tailings by Flame Atomic Absorption Spectrometry

采用盐酸、氖氟酸、硝酸、高氯酸分步溶解的方式对具有硅、铁含量高等特性的铜原矿尾矿样品进行溶解。在体积分数为5％的盐酸介质中，利用原子吸收光谱法，采用扣除背景方式对样品溶液进行测定。样品溶解较完全，共存元素对镉的测定基本无干扰。方法重现性较好，准确度较高。相对标准偏差在2．3％～8．3％，加标回收率在96．7％～105％，标准样品分析结果与标准值基本一致。能满足日常分析检测的需要。

For the copper original tailings which have high si digestion method was established using hydrochloric acid, hydrofl In a 5% （v/v） hydrochloric acid medium, the sample sol and iron contents, a step-by-step uoric acid, were determined id and by at perchloric acid omlc spectroscopy after background correction. The analytical results showed that the samples wer complelely by this method. The coexisting elements element. This method has a good repeatabilily and high was between 2.3% and 8.3%. The recovery was betwe were in good agreement with the certified values. This copper original tailings samples. absorption e dissolved did not interfere with the determination of Cd accuracy. The relative standard deviation （RSD） en 96.7% and 105%. The results of this method method can meet the needs for daily analysis in