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投稿时间:2015-05-17 修订日期:2015-07-16
投稿时间:2015-05-17 修订日期:2015-07-16
中文摘要: 基于冰铜基体成分特点,在传统碘量法的基础上,对冰铜样品的前处理方法进行了改进,硝酸-氯酸钾溶解样品除硫,氨水-氯化铵二次沉淀分离铜,一次完成测定,省略了原子吸收光谱法补正的步骤,满足了碘量法快速测定冰铜中铜含量的要求。实验表明,相对标准偏差(RSD)在0.61%~1.9%,经国家标准物质验证及分析方法比对,结果准确可靠,精密度和准确度均能满足检测要求。方法简便,快速,大大提高了工作效率。较好地解决了冰铜中铜含量的快速测定,易于推广应用。
Abstract:According to the characteristics of matrix composition of matte, a pre-treatment method of copper in matte was improved on the base of traditional iodimetry. The sample was dissolved by nitrate–potassium chlorate for removing sulfur, and then copper was obtained by ammonia-ammonium chloride secondary precipitation. Thus, the content of copper could be directly determined. The proposed method can not only meet the requirement for rapid determination copper in matte by iodimetry, but also reduce the procedure of atomic absorption and supplement. The results indicated that the relative standard deviation (RSD) was 0.61%~1.9%. The method has been verified by national certified reference materials and compared with other methods, and the accuracy and precision were satisfactory. It is characterized by convenience, rapid analytical speed and efficiency to apply.
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基金项目:河北省地矿中心实验室技术创新项目()资助
作者 | 单位 |
胡艳巧 | 河北省地矿中心实验室,河北 保定 071051 |
程文翠 | 河北省地矿中心实验室,河北 保定 071051 |
支云川 | 河北省地矿中心实验室,河北 保定 071051 |
魏利 | 河北省地矿中心实验室,河北 保定 071051 |
张金明 | 河北省地矿中心实验室,河北 保定 071051 |
引用文本:
胡艳巧,程文翠,支云川,魏利,张金明.氨水-氯化铵二次沉淀-碘量法快速测定冰铜中铜的含量[J].中国无机分析化学,2015,5(4):65-68.
HU Yanqiao,CHENG Wencui,ZHI Yunchuan,WEI Li,ZHANG Jinming.Rapid Determination of Copper in Matte by Iodimetry Combined with Ammonia-Ammonium Chloride Secondary Precipitation[J].Chinese Journal of Inorganic Analytical Chemistry,2015,5(4):65-68.
胡艳巧,程文翠,支云川,魏利,张金明.氨水-氯化铵二次沉淀-碘量法快速测定冰铜中铜的含量[J].中国无机分析化学,2015,5(4):65-68.
HU Yanqiao,CHENG Wencui,ZHI Yunchuan,WEI Li,ZHANG Jinming.Rapid Determination of Copper in Matte by Iodimetry Combined with Ammonia-Ammonium Chloride Secondary Precipitation[J].Chinese Journal of Inorganic Analytical Chemistry,2015,5(4):65-68.