Nanocomposite Based Carbon Paste Electrode for Selective Analysis of Copper

Nanocomposite based carbon paste ion-selective electrode for analysis of copper was prepared. The sensing material used in this sensor was a coumarin derivative. Conductomeric study in acetonitrile solution showed a selective interaction between sensing material and copper ions in comparison with other common metal ions. Multi-walled carbon nanotubes (MWCNTs) and nanosilica was used for modifying the sensor response. The proposed electrode showed a stable potential response to Cu 2+ ions with Nernstian slope of 29.3±0.5 mV decade-1 over a wide linear concentration range of 10-6-10-1 mol L-1. The electrode has short response time of 15 s and could be used for a period of 6 weeks. The electrode was used successfully for analysis of copper in waste water samples