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.