Electrocatalytic sensor for the determination of chemical oxygen demand using a lead dioxide modified electrode

被引：66
作者：
Ai, SY [1 ]
Gao, MN [1 ]
Yang, Y [1 ]
Li, JQ [1 ]
Jin, LT [1 ]
机构：
[1] E China Normal Univ, Dept Chem, Shanghai 200062, Peoples R China
来源：
ELECTROANALYSIS | 2004年 / 16卷 / 05期
关键词：
chemical oxygen demand (COD); nano-PbO2; electrocatalytic sensor; amperometry;
D O I：
10.1002/elan.200302839
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
An amperometric method that makes use of a nano-PbO2 modified electrode as an electrocatalytic sensor for the determination of chemical oxygen demand (COD) is described. The sensor signal was observed as a result of the detection of the oxidation current due to electrocatalytic oxidation of organic compounds in the sample solution. This sensor responded linearly to the CODCr of standard samples in the range of 5 - 3000 ppm and the detection limit was 2.5 ppm. When using the sensor to determine real samples, it displays short analysis time, simplicity and no sample pretreatment. The sensor was stable for over 20 days in real wastewater samples and has successfully been applied to the determination of COD in real wastewater samples.
引用
收藏
页码：404 / 409
页数：6
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