Electrochemical Studies of Bromothymol Blue at surfactant Modified Carbon Paste Electrode By using Cyclic Voltammetry

The electrochemical response of Bromothymol blue at carbon paste electrode in presence of 0.1M KCl was investigated by the cyclic voltammetric technique. It showed a well-defined oxidation peak at 0.73V and a sensitive reduction peaks at 0.34 V. The effect of concentration and scan rate of Bromothymol blue was studied. The scan rate effect showed the electrode process is adsorption-controlled. The effect of surfactants like Sodium Dodecyl Sulfate (SDS), Cetyltrimethylammonium Bromide (CTAB), and TritonX-100 (TX-100) were studied by immobilizing method. Among these SDS was showed excellent enhancement in both oxidation peak and reduction peak currents. The concentration effect of the SDS surfactant was studied.