| Fe(Ⅱ)-Ce(Ⅳ)双中间体库仑滴定的电极伏安行为及Cr(Ⅵ)测定 |
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| 引用本文： | 杨百勤,左芳,杜宝中.Fe(Ⅱ)-Ce(Ⅳ)双中间体库仑滴定的电极伏安行为及Cr(Ⅵ)测定[J].分析科学学报,2012,28(3):361-364. |
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| 作者姓名： | 杨百勤 左芳 杜宝中 |
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| 作者单位： | 1. 陕西科技大学化学与化工学院,陕西西安,710021
2. 西安理工大学应用化学系,陕西西安,710048 |
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| 摘 要： | 采用循环伏安法研究了Fe(Ⅱ)-Ce(Ⅳ)双中间体恒电流库仑滴定体系及工作电极的电化学行为,优化了电解液组成,探讨了S2-和Cl-等的干扰机理。在优化的分析条件下,方法用于测定工业废水中μg级的Cr(Ⅵ),与分光光度法对照,相对误差小于3%,回收率在93.9%～98.9%之间。该法简便、快速、灵敏、准确,且不受试样颜色、浊度及沉淀的影响,无需配制标准溶液,可连续测定。
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| 关 键 词： | 循环伏安法 Fe(Ⅱ)-Ce(Ⅳ)双中间体库仑法 工业废水 铬(Ⅵ) |
Voltammetric Behavior of Electrode in Coulometric Titration with Dual-intermediate[Fe(Ⅱ)-Ce(Ⅳ)] and Determination of Cr(Ⅵ) |
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| YANG Bai-qin
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ZUO Fang
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DU Bao-zhong.Voltammetric Behavior of Electrode in Coulometric Titration with Dual-intermediate[Fe(Ⅱ)-Ce(Ⅳ)] and Determination of Cr(Ⅵ)[J].Journal of Analytical Science,2012,28(3):361-364. |
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| Authors: | YANG Bai-qin ZUO Fang DU Bao-zhong |
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| Institution: | 1.College of Chemistry and Chemical Engineering,Shaanxi University of Science & Technology,Xi’an710021;2.Department of Applicated Chemistry,Xian University of Technology,Xi’an710048) |
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| Abstract: | The system of constant current coulometric titration with dual-intermediateFe(Ⅱ)-Ce(Ⅳ)] and electrochemical behavior of working electrode were studied by cyclic voltammetry.The composition of the electrolyte was optimized and applied to determine Cr(Ⅵ)on microgram level in industrial wastewater,with the relative error less than 3%,and recovery from 93.9%to 98.9%.This method is simple,fast,sensitive and accurate,which is not affected by the color and turbidity of samples.It can be performed without standards,and used for the determination of a series of samples in one electrolyte continuously. |
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| Keywords: | Cyclic voltammetry Fe(Ⅱ)-Ce(Ⅳ)dual-intermediate coulometric method Industry wastewater Cr(Ⅵ) |
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