| Application of triple potential step amperometry method for quantitative electroanalysis |
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| 作者姓名： | LIU ChenMing CAO HongBin LI YuPing ZHANG Yi |
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| 作者单位： | [1]Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China; [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (Grant Nos. 20577051 and 20607023) |
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| 摘 要： | A novel quantitative electroanalysis method, triple potential step amperometry (TPSA), was developed and explained with an example of nitrobenzene analyzing in water. The selectivity of TPSA was im- proved by controlling the potential step within a narrow interval and using enzyme-modified electrode, the narrow potential step makes the method avoid most interferents, and enzyme-modified electrode can enhance the response of target substance selectively. The peak area was investigated for quanti- tative calibration, such as nitrobenzene concentration showing a linear relation with the peak area, with the correlation coefficients being 0.9995. The t-test and F-test were applied to evaluating the reliability of TPSA, the results showed that there was no evidence of systematic error for TPSA, and the method was of no significant difference from CV. The merit of fast detecting and few potential changing times make the TPSA suitably applicable to low-cost automatic monitoring equipments.
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| 关 键 词： | 电流测定法 电阻板 电量电解 电子学 |
| 收稿时间： | 4 December 2006 |
| 修稿时间： | 2006-12-04 |
Application of triple potential step amperometry method for quantitative electroanalysis |
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| LIU ChenMing CAO HongBin LI YuPing ZHANG Yi.Application of triple potential step amperometry method for quantitative electroanalysis[J].Chinese Science Bulletin,2007,52(20):2771-2774. |
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| Authors: | Liu ChenMing Cao HongBin Li YuPing Zhang Yi |
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| Institution: | (1) Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100080, China;(2) Graduate University of Chinese Academy of Sciences, Beijing, 100049, China |
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| Abstract: | A novel quantitative electroanalysis method, triple potential step amperometry (TPSA), was developed and explained with an example of nitrobenzene analyzing in water. The selectivity of TPSA was im- proved by controlling the potential step within a narrow interval and using enzyme-modified electrode, the narrow potential step makes the method avoid most interferents, and enzyme-modified electrode can enhance the response of target substance selectively. The peak area was investigated for quanti- tative calibration, such as nitrobenzene concentration showing a linear relation with the peak area, with the correlation coefficients being 0.9995. The t-test and F-test were applied to evaluating the reliability of TPSA, the results showed that there was no evidence of systematic error for TPSA, and the method was of no significant difference from CV. The merit of fast detecting and few potential changing times make the TPSA suitably applicable to low-cost automatic monitoring equipments. |
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| Keywords: | triple potential step amperometry enzyme-modified electrode nitroreductase electroanalysis |
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