Horse radish peroxidase immobilized polyaniline for hydrogen peroxide sensor |
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Authors: | Pratima R Solanki Ajeet Kaushik Anees A Ansari G Sumana B D Malhotra |
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Institution: | Department of Science & Technology Centre on Biomolecular Electronics, National Physical Laboratory, K. S. Krishnan Marg, New Delhi‐110012, India |
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Abstract: | Horse radish peroxidase (HRP) has been electrochemically entrapped into perchlorate (ClO) doped polyaniline (PANI) film deposited onto indium‐tin‐oxide (ITO) coated glass plate. This HRP‐PANI‐ClO/ITO bioelectrode characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), UV‐Visible spectroscopy, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) techniques has been utilized for estimation of hydrogen peroxide (H2O2). This H2O2 sensor exhibits response time of 5 s, linearity from 3 to 136 mM, sensitivity as 0.5638 µA mM?1 cm?2 with linear regression of 0.985. The value of the Michaelis–Menten constant (Km) has been obtained as 1.984 mM. Copyright © 2009 John Wiley & Sons, Ltd. |
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Keywords: | electrochemical entrapment polyaniline horse radish peroxidase biosensor |
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