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首页> 外文会议>2nd International Conference on Processing Materials for Properties, Nov 5-8, 2000, San Francisco, California >Determination of trace arsenic(Ⅲ),arsenic(V), antimony(Ⅲ), antimony(V) in drain by ICP equipped with hydridegeneration system
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Determination of trace arsenic(Ⅲ),arsenic(V), antimony(Ⅲ), antimony(V) in drain by ICP equipped with hydridegeneration system

机译：氢化物发生-ICP法测定废水中痕量砷（Ⅲ），砷（V），锑（Ⅲ），锑（V）

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摘要

By newly developed ICP method, trace amounts of As(Ⅲ), As(Ⅴ), Sb(Ⅲ) and Sb(Ⅴ) were precisely determined within accuracy of sub ng/ml. As(Ⅲ) and Sb(Ⅲ) were separated from As(Ⅴ) and Sb(Ⅴ) by extracting into xylene as diethyldithiocarbamate complexes using diethylammonium diethyldithiocarbamate (DDDC), and then back-extracted into nitric acid for a quantitative determination by ICP-AES equipped with hydridegeneration system. The recoveries of As(Ⅲ) and Sb(Ⅲ) were satisfactory throughout the extraction with 0.04mol/l DDDC in xylene from 1mol/l hydrochloric acid solution and the back-extraction with 7 mol/l nitric acid. As(Ⅴ) and Sb(Ⅴ) were reduced to As(Ⅲ) and Sb(Ⅲ) by ascorbic acid and potassium iodide, and their quantities were determined as mentioned above. The detection limits were found to be 0.58ng/ml for As(Ⅲ), 0.63ng/ml for Sb(Ⅲ) using 50ml of a sample. The proposed method was applied to analysis of the real sample.
机译：通过新开发的ICP方法，可以在亚ng / ml的精度范围内精确测定痕量的As（Ⅲ），As（Ⅴ），Sb（Ⅲ）和Sb（Ⅴ）。通过使用二乙基二硫代氨基甲酸二铵铵（DDDC）提取二甲苯二乙基二硫代氨基甲酸酯络合物，将As（Ⅲ）和Sb（Ⅲ）与As（Ⅴ）和Sb（Ⅴ）分离，然后反萃取为硝酸，用ICP-MS定量测定AES配备了氢化物发生系统。在从1mol / l盐酸溶液中用0.04mol / l DDDC在二甲苯中萃取和用7 mol / l硝酸反萃取过程中，As（Ⅲ）和Sb（Ⅲ）的回收率令人满意。抗坏血酸和碘化钾将As（Ⅴ）和Sb（Ⅴ）还原为As（Ⅲ）和Sb（Ⅲ），并按上述方法测定其含量。使用50 ml样品，As（Ⅲ）的检出限为0.58ng / ml，Sb（Ⅲ）的检出限为0.63ng / ml。将该方法应用于实际样品的分析。

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