Determination of chemical oxygen demand by flow injection analysis using amperometric detector with nano PbO2 modified electrode

作者：Li JQ; Li LP; Zheng L; Xu HH; Jin LT^*

来源：Chemical Journal of Chinese Universities, 2005, 26(10): 1808-1811.

• PbO2 modified electrode
• flow injection analysis
• amperometric detector
• delermination of chemistry oxygen demand(COD)

An electrochemical detection system with a nanometer lead dioxide modified electrode for flow injection analysis to determine chemical oxygen demand( COD) is described. The measuring principle is based on the current response on the PbO2 modified electrode which is proportional to the COD value of the standard water sample range of 50-1 200 mg/L. Under the optimized experiment conditions, and the detection limit is 20 mg/L. When this method was applied to the determination of real water samples, it has the advantage of no sample pretreatment, short analysis time, simplicity, a minimum sample and reagent consumption and easy automation. Additionally, the method for determination of COD is in excellent correspondence with the values.

• 出版日期2005-10-10
• 单位华东师范大学