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Citation: LI Rong, JIANG Xiao-Li, HE Xiao-Ying, LI Jiang. Electrochemical Behaviour and Determination of Paraquat on Sodium Based Montmorillonite Modified Glassy Carbon Electrode[J]. Chinese Journal of Applied Chemistry, ;2009, 26(7): 816-821. shu

Electrochemical Behaviour and Determination of Paraquat on Sodium Based Montmorillonite Modified Glassy Carbon Electrode

1.
Institute of Chemical Engineering, China West Normal University, Nanchong 637002

Corresponding author: HE Xiao-Ying,
Received Date: 5 June 2008
Available Online: 20 September 2008
Fund Project: 四川省教育厅重点科研资助项目(2004A106) (2004A106)

Hexadecyltrimethylammonium bromide(CTAB) modified clay(CTAB-NaMM) electrode was made.The electrochemical behavior of paraquat(PQ) was studied by cyclic voltammetry and the process was controlled by diffusion.The important electrochemical parameters including the effective area of CTAB-NaMM-CMC/GCE A_eff=2.108 mm²,and the diffusion coefficient D=5.73×10^-4 cm²/s was calculated.The correlation between the peak current and concentration was studied by square wave stripping voltammetry(SWSV).From the results we can find a good linearity between the peak current and concentration of PQ in a range of 9.660×10^-7~3.865×10^-4 mol/L,and its detect limitation was 3.297×10-7 mol/L.The content of PQ in real water was detected by means of SWSV with a spiked recovery rate of between 94.55% and 108.25% for ipa1.
- montmorillonite,
- CTAB,
- paraquat,
- electrochemical behavior,
- square wave stripping voltammetry
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