丁二酮肟比色法测定红土镍矿中的镍含量

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英文篇名：Determination of Nickel Content in Laterite Nickel Ores by Dimetylglyoxime Spectrophotometry 作者：李晓晗 英文作者：LI Xiao-han;Shenyang Research Institute of Nonferrous Metals Co.,Ltd.; 关键词：分光光度法 ; 红土镍矿 ; 丁二酮肟 ; 镍 英文关键词：spectrophotometry;;laterite nickel ores;;dimethylglyoxime;;nickel 中文刊名：YSKY 英文刊名：Non-Ferrous Mining and Metallurgy 机构：沈阳有色金属研究院有限公司; 出版日期：2019-06-15 出版单位：有色矿冶 年：2019 期：v.35;No.205 语种：中文; 页：YSKY201903015 页数：3 CN：03 ISSN：21-1112/TF 分类号：70-72

摘要

采用盐酸、硝酸、氢氟酸和高氯酸混合酸分解试样,在碱性介质并有氧化剂存在的条件下,镍离子与丁二酮肟形成稳定的酒红色络合物,于460nm波长处进行吸光度测定,根据朗伯比尔定律计算镍含量。实验得到该方法的相对标准偏差RSD(n=9):1.02%～1.61%,加标回收率:98.33%～101.28%,能够满足红土镍矿中镍含量的快速、准确测定。
        The samples were decomposed by hydrochloric acid,nitric acid,hydrofluoric acid and perchloric acid mixture.Under the presence of alkaline medium and oxidant,nickel ions and dimethylglyoxime formed a stable wine red complex,and the absorbency was determined at the 460 nm wave strength.According to Langbobier's law,the nickel content was calculated.The relative standard deviation RSD(n=9)of this method is obtained experimentally:1.02%-1.61%,and the standard recovery rate is:98.33%-101.28%,which can satisfy the rapid and accurate determination of nickel content in clay nickel ore.

引文

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