Fabrication a composite carbon paste electrodes (CPEs) modified with multi-wall carbon nano-tubes (MWCNTs/N, N-Bis (salicyliden)-1,3-propandiamine) for determination of lanthanum (III)

In this work, we introduced the fabrication of a novel modified Carbon Paste Electrode (CPE) for the determination of Lanthanum ion based on Multi-Walled carbon nanotubes. The CPE combination contained paraffin, graphite and N, N-Bus (salicyliden)-1,3-propandiamine (SB-SalPr) that we reemployed in the structure of electrode. After specifying the optimal percentages, this electrode showed the Nernstian response with a slope of 19.37 (mV/decade) to La^3+ ion in response time ( 10 s), the concentration range from (10^-2_10^-8 M) with detection limit of 5.21×10^-9 M. The potential response of the electrode remained constant in the pH range of 5-9.