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Lead ion of sulfate was studied electrochemically analysis, using cyclic voltammetric technique by glassy carbon electrode (GCE) in normal saline solution (0.9%NaCl). The results of the study have been found oxidation and reduction current peaks of lead ion in normal saline at -550 mV and -650mV respectively. It was studied the electrochemical properties of the redox current peaks of Pb(II) with different reagents such as glucose, uric acid, urea and ascorbic acid in normal saline. The redox current peaks of Pb(II) were enhanced through using each of glucose, uric acid and urea, but in ascorbic acid the reduction current peak was reduced. Also, the other phenomena of the reduction current peak of Pb(II) was disappeared when using blood as an electrolyte because the lead ions act as oxidant pollutant in blood medium.

The study of Sodium Saccharin (NaSc), this one of the chemical compounds was used as a replacement for natural sugar, which taking by diabetic patients. NaSc was studied by cyclic voltammetric technique to analysis at different temperature using modified glassy carbon electrode (GCE) with carbon nanotubes (CNT) as working electrode (CNT/GCE). Activation energy (Ea*) of NaSc was studied in 1M Na2SO4 as an electrolyte at different temperature using Arrhenius equation at both GCE and CNT/GCE. Other thermodynamic parameters such as activation free energy (∆G*), activation enthalpy (∆H*) and activation entropy (∆S*) were determined at both GCE and CNT/GCE using Eyring equation. Other thermodynamic parameters such as the values of entropy for cathodic current peak of NaSc on GCE and CNT/GCE are positive value, this means that the reaction is spontaneous reversible, but the negative values of entropy is irreversible reaction.

Electrochemical studies by cyclic voltammetric (CV) method provide high potential for investigation of oxidant pollutant compounds such as Pb(II). Glassy carbon electrode (GCE) can be used for the potentiostatic analysis of the lead ions in different electrolyte especially human blood medium to studying the effect of the lead ions on the blood components. The results of this study were found that oxidation and reduction current peaks of lead ions in 1M KCl is high value and enhanced by adding ascorbic acid (AA) solution, while in human blood medium was disappearing the reduction current peak and enhance the oxidation current peak by lead ions. It means that lead ions in blood medium act as an oxidative reagent and causes problem in the decomposition of the blood component. Also, it was found that using folic acid (FA) solution with lead ions in blood medium causes the enhancement of reduction current peaks of lead ion and decreasing for oxidation current peaks, so this means that folic acid solution acts as antioxidative reagent in present of lead ions in blood medium, it may recommended to taking tablet of FA for the patients who suffers to lead pollution.