| 流动注射-电化学氧化法测定水体化学需氧量 |
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| 引用本文： | 王金良,只金芳.流动注射-电化学氧化法测定水体化学需氧量[J].分析试验室,2010,29(10). |
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| 作者姓名： | 王金良 只金芳 |
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| 作者单位： | 1. 中国科学院理化技术研究所,北京100190;中国科学院研究生院,北京100049
2. 中国科学院理化技术研究所,北京,100190 |
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| 摘 要： | 采用硼掺杂金刚石(Boron-doped diamond,BDD)薄膜电极为工作电极,利用流动注射分析方法测定水体化学需氧量(COD),根据水样中有机物组分在工作电极表面氧化消耗的电量(Qoxidation)测定样品的COD值。考察了一些基本参数包括载液、工作电位、流速对检测信号的影响并选定了最佳检测条件。在最佳检测条件下,本法检测COD的线性范围为2.5~120 mg/L,检出限为1 mg/L。用该法测定化工厂和食品厂废水的COD值,相对标准偏差和回收率分别在2.4%~4.8%和96%~106%之间,且检测结果与国家标准方法(CODcr法)有良好的一致性。
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| 关 键 词： | 硼掺杂金刚石薄膜电极 流动注射分析 化学需氧量 |
Flow injection analysis of COD based on electrochemical oxidation method |
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| WANG Jin-liang,ZHI Jin-fang.Flow injection analysis of COD based on electrochemical oxidation method[J].Chinese Journal of Analysis Laboratory,2010,29(10). |
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| Authors: | WANG Jin-liang ZHI Jin-fang |
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| Institution: | WANG Jin-liang1,2 and ZHI Jin-fang1(1.Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,2.Graduate School of Chinese Academy of Science,Beijing 100190) |
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| Abstract: | A flow injection analysis(FIA) method for the determination of chemical oxygen demand(COD) based on boron-doped diamond(BDD) film electrode has been described.In this method,the electric quantity consumed by the electrochemical oxidation of the organic species existing in the water samples was defined as the measurement signal.The influence of several basic experimental parameters including supporting electrolyte,applied potential and flow rate on the response of the BDD electrode was investigated and the o... |
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| Keywords: | Boron-doped diamond(BDD) film electrode Flow injection analysis(FIA) Chemical oxygen demand(COD) |
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