P. Gopal, T. M. Reddy, K. Reddaiah
Feb 1, 2013
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Influential Citations
16
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Journal
Journal of Molecular Liquids
Abstract
Abstract The voltammetric behavior of 3, 5-Dinitrobenzoic acid (3, 5-DNBA) has been studied at a Glassy carbon electrode (GCE). 3, 5-DNBA was found to produce two reduction peaks in the forward scan i.e. 0.0 V to − 0.1 V. In acidic medium there were no peaks in the reverse scan, indicating irreversible system and diffusion controlled process. The effect of different parameters such as pH, scan rate, concentration, surfactants, repeatability and reproducibility was studied. Based on the results obtained a reduction mechanism was proposed for 3, 5-DNBA. The limits of detection (LOD) and limit of quantification (LOQ) values were found to be 0.68 × 10 − 6 M and 2.26 × 10 − 6 M respectively. The total number of electrons ( n ), diffusion coefficient ( D ), charge transfer coefficient ( α ), the number of electrons involved in rate determining step ( n α ) and area of the working electrode ( A ) were calculated as 12, 3.897 × 10 − 3 cm 2 /s, 0.46, 2, 0.3743 × 10 − 3 cm 2 respectively. The electrochemical impedance spectroscopic (EIS) studies of 3, 5-DNBA at GCE and Pt electrode were also studied.