| 电位法测定微量铀的研究 |
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| 引用本文： | 周嫩民,何荣桓,王世敬.电位法测定微量铀的研究[J].高师理科学刊,1995(1). |
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| 作者姓名： | 周嫩民 何荣桓 王世敬 |
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| 作者单位： | 齐齐哈尔师范学院化学系(周嫩民)，烟台师院(何荣桓)，绥化四中(王世敬) |
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| 摘 要： | 本文用电位法研究了UO_2~(2+)-CO_3~(2-)(HCO_3~-)体系的配位反应,发现体系的电位变化在0～24μgU(Ⅵ)/mL范围内与U(Ⅵ)浓度间存在良好的线性关系。据此提出了一种测定微量铀的方法,确定了测定的最佳条件;借助离子交换分离富集,可准确测定的浓度下限为0.1μg/mL。测定了实验室中模拟含铀废水中铀(Ⅵ)含量,得到了满意结果。回收率为94.3％～105.6％。
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| 关 键 词： | 铀 痕量金属分析 电化学分析 离子交换 |
Investigation of Potentiometric Determination of Trace U(Ⅵ) with UO_2~(2-)-CO_3~(2-) Systems |
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| Zhou Nenmin,He Ronghuan,Wang Shijing.Investigation of Potentiometric Determination of Trace U(Ⅵ) with UO_2~(2-)-CO_3~(2-) Systems[J].Journal of Science of Teachers＇College and University,1995(1). |
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| Authors: | Zhou Nenmin He Ronghuan Wang Shijing |
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| Institution: | Zhou Nenmin He Ronghuan Wang Shijing (Department of Chemistry) (Yantai Teachers College) (No.4 Middle School of Shuihua County) |
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| Abstract: | The coordination reaction ofUO_2~(2-)-CO_3~(2-)systems are studied potentiometrically, and a method for potentiometric determination of trace U(VI)has been established based on this reaction. The calibration graph is linear for 0-24μg U(VI)/mL under given conditions. 2.4μg U(VI)/mL can be determined accurately within dev. of≠±5% , and the detection limit is lowered to 0.1μg U(VI)/mL with the aid of ion exchanging enrichment. The method has been used for the determination of trace U(VI)in simulated waste waters, the recovery is between 94.3 and 105.6% and the results are satisfactory. |
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| Keywords: | Uranium Trace metal analysis Electrochemical analysis Ion exhanging |
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