Electrochemical study of selenium (IV) mediated by carbon nanotubes modified glassy carbon electrode in blood medium

Abstract

sodium selenite se(iv) was studied by cyclic voltammetric technique to identify the extent of its effect on both normal saline and blood medium components as oxidative or antioxidative reagent.carbon nanotube (cnt) was used to modify glassy carbon electrode (Gce) for the enhancement of redox current peaks.it was found from the results of the study that reduction current peak of se(iv) in blood medium appears at -1v in 0.1 mm of sodium selenite, but the reduction current peak disappears when adding more amount of se(iv) to the blood which causes enhancement of the oxidation current peak of se(iv) at 0.25 v in 10 mm of sodium selenite.Ascorbic acid (AA) was affected on the redox current peaks of se(iv) in blood medium that enhanced the cathodic current peak and disappearing the anodic current peak.so sodium selenite considered as antioxidative material at low concentration in blood medium and become oxidative in high concentration especially in presence of AA.