| 方波、差分脉冲伏安法测定水中的镉的最佳条件的研究 |
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| 引用本文： | 单连海,郭海霞.方波、差分脉冲伏安法测定水中的镉的最佳条件的研究[J].西南民族学院学报(自然科学版),2007,33(2):350-355. |
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| 作者姓名： | 单连海 郭海霞 |
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| 作者单位： | 西南交通大学药学院 峨眉614202(单连海)，西南交通大学高教研究所 峨眉614202(郭海霞) |
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| 摘 要： | 本实验应用MEC-12B型多功能微机电化学分析仪,采用方波电压伏安法和差分脉冲电压伏安法,以悬汞电极为工作电极,对测定水样中的镉选用何种底液以及多少通氮时间、静置时间、扫描电压有较好的线性结果进行研究.结果表明:在0.01moL/LKI和0.01moL/LNH3-NH4Cl以1:1混合溶液作底液,通氮5分钟,方波电压伏安法静置2分钟,扫描电压为-0.5v～0.1v时,差分脉冲电压伏安法静置4分钟,扫描电压为-0.6v～0.2v时,效果最好.在此条件下Cd2 (10-11–10-9moL/L)之间与峰电流有较好的线性关系.
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| 关 键 词： | 镉 最佳条件 微机电化学分析系统 伏安法 |
| 文章编号： | 1003-2843（2007）01-0350-05 |
| 修稿时间： | 2006-11-21 |
Research on the best condition of determining the concentration of cadmium by Square Wave and Differential Pulse Voltammetry |
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| CHAN Lian-hai,GU Hai-xia.Research on the best condition of determining the concentration of cadmium by Square Wave and Differential Pulse Voltammetry[J].Journal of Southwest Nationalities College(Natural Science Edition),2007,33(2):350-355. |
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| Authors: | CHAN Lian-hai GU Hai-xia |
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| Institution: | Southwest Jiaotong University, Emei 614202, P. R. C. |
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| Abstract: | The paper introduces the condition of determining the concentration of cadmium by the model MEC-12B Multi-function Microcomputer Electrochemical Analyzer, which uses hanging mercury electrode as work electrode and the method of Square Wave Voltammetry and Differential Pulse Voltammetry. The result is in the mixture of potassiumiodine and Ammonia-Ammonia chcoride buffer solution whose concentration is 0.01molarity, and we should let Nitrogen through the mixture for 5 minutes and keep the mixture still for 2 minutes or 4 minutes, and the concentration of cadmiumion from 10-11~10-9 molarity with the peak circulation fit a better line. |
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| Keywords: | MEC-12B Multi-function Microcomputer Electrochemical Analyzer Cadmium the best condition voltammetry method |
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