Author/Authors :
Chandrashekar، Bannanakere N. نويسنده Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Shankaraghatta -577 451, Shimoga, Karnataka, India , , Kumara Swamy، Bahaddurghatta E. نويسنده Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnana Sahyadri, Shankaraghatta, Shimoga, Karnataka 577451, India , , Pandurangachar، Mundargi نويسنده Department of Chemistry, SSMRV Degree College, Jayanagara 4T Block, Banglore-41, Karnataka, India , , Sathisha، Tammanekar V. نويسنده Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Shankaraghatta -577 451, Shimoga, Karnataka, India , , Sherigara ، Bailure Sherigara S. نويسنده Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnana Sahyadri, Shankaraghatta, Karnataka, India ,
Abstract :
4-aminophenol is the main impurity present in preparations of paracetamol.
Using the cyclic voltammetry, the electrode behaviour of 4-aminophenol has been studied
in 0.1 M phosphate buffer solutions at carbon paste electrode and surfactant modified
carbon paste electrode. The optimal potential window of wide range from -0.4 V to 0.7 V
was selected. The electron transfer kinetics of the CTAB/CPE in the detection of analyte
was determined by the scan rate effect and concentration variation studies. The scan rate
effect showed the electrode process is adsorption controlled. The oxidation peak currents
represented a linear dependence on 4-aminophenol concentration from 1 mM to 4 mM
with correlation coefficient r2=0.9942. The effect of cationic surfactant shows good high
sensitivity and stability for the redox process of the 4-amino phenol. The detection limit
was found to be 1×10-7 M.
