Chinese Journal of Applied Chemistry

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Determination of Pb(Ⅱ), Cd(Ⅱ) with Melamine Chelating Resin/Multi-walled Carbon Nanotubes Composites Modified Waxed Graphite Electrode

XU Siyuan, LEI Ping, JIN Guanping*   

  1. (School of Chemical Engineering,Hefei University of Technology,Hefei 230009,China)
  • Received:2013-03-04 Revised:2013-05-03 Online:2014-02-10 Published:2014-02-10

Abstract: Melamine-formaldehyde-thiourea chelating resin coated multi-walled carbon nanotube(MFT/MWCNTs) composite was prepared by ultrasonic method, and characterized by field emission scanning electron microscope and electrochemical techniques. The composite modified waxed graphite electrode(MFT/MWCNTs/WGE) was successfully applied to Pb(Ⅱ), Cd(Ⅱ) simultaneously screening. The striping peak current shows a good linear relationship in the concentration range of 3×10-8~9×10-7 mol/L for Pb(Ⅱ) and 5×10-8~7×10-7 mol/L for Cd(Ⅱ), with a detection limit of 2×10-9 and 3×10-9 mol/L(3σ) for Pb(Ⅱ) and Cd(Ⅱ), respectively.

Key words: ultrasonic synthesis, melamine-formaldehyde-thiourea chelating resin, multi-walled carbon nanotube, waxed graphite, heavy metal ions

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