Abstract

Zahra Heidari, Mahboubeh Masrournia*, and  Razea Sannavii Khoshnood

DOI : http://dx.doi.org/10.13005/ojc/320171

A nanocomposite based on carbon paste electrode fabricated, by using zeolite as ion carrier .Functional multi-wall carbon nanotube was used for improvement of electrode response. The optimal composition of CPE was built from 65% graphite powder, 20 wt% paraffin oil, 5% ion carrier (zeolite), 10% MWCNTs. Electrode showed Nernstian response 19.88 (±0.2)mVdecade−1 in the measuring range 10−7–10−2 mol L−1 and showed detection limit of 6.3×10-7 M. The sensor was successfully used for potentiometric titration Cr3+ with EDTA. The carbon paste electrode showed fast response time, good selectivity and applicable in the wide pH range of 3 -10.

sensor; ion selective electrode; multi-walled carbon nanotubes; potentiometry; zeolite

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