Polyaniline/nickel Composite Film Modified Electrode for Sensitive Electrochemical Determination of Ascorbic Acid

Mani Govindasamy
2016 International Journal of Electrochemical Science  
We have designed and fabricated a low-cost modified electrode based on polyaniline and Ni composite (PANI-Ni) for the sensitive determination ascorbic acid (AA). The composite formation was characterized by scanning electron microscopy, Energy-dispersive X-ray spectroscopy, electrochemical impedance spectroscopy and electrochemical methods. The PANI-Ni composite was used to modify the screen printed carbon electrode (SPCE) and the resulting modified electrode was used to develop AA sensor. The
more » ... lop AA sensor. The modified electrode shows excellent electrocatalytic activity to the oxidation of AA. An amperometric sensor was developed using PANI-Ni composite which delivered sensitive and prompt signals for AA. The linear range is 2-1210 µM, detection limit is 0.4 µM, and sensitivity is 0.479 µAµM cm -2 . Moreover, the electrode has good repeatability, reproducibility and stability. The practical applicability of the electrode is demonstrated in human urine samples.
doi:10.20964/2016.12.98 fatcat:v7olikn2ijexhhc7hqwhepmr4m