Electrochemical Response of Ascorbic Acid Using Screen-Printed Carbon Electrode

Authors W. Illiya, L.M. Permatasari , F. Ardyansyah , K.A. Madurani , F. Kurniawan

Department of Chemistry, Institut Teknologi Sepuluh Nopember, 60111 Sukolilo, Indonesia

Е-mail fredy@chem.its.ac.id
Issue Volume 14, Year 2022, Number 3
Dates Received 24 March 2022; revised manuscript received 25 June 2022; published online 30 June 2022
Citation W. Illiya, L.M. Permatasari, F. Ardyansyah, et al., J. Nano- Electron. Phys. 14 No 3, 03010 (2022)
DOI https://doi.org/10.21272/jnep.14(3).03010
PACS Number(s) 82.45.Fk
Keywords SPCE (2) , Electrochemical response, Ascorbic acid, Innovation, Scientific research, Technology (13) .

Electrochemical response of ascorbic acid (AA) has been studied using a screen-printed carbon electrode (SPCE). The electrochemical response was measured using cyclic voltammetry (CV) in 0.1 M phosphate buffer solution at various pH. The measurement was carried out at a potential of – 0.75 V to + 1.0 V at room temperature. The effect of scan rate was observed from 25 to 125 mV/s. The presence of interference compounds, i.e., glucose, uric acid and urea during AA measurement was also investigated. The electrochemical response of AA using SPCE was observed at around + 0.45 V in all pH variations without reduction peak. This indicated that AA can be detected by SPCE from its oxidation peak. It is in good agreement with the natural properties of AA, which is easily oxidized, tuning into dehydroascorbic acid (DHAA). No interference signal was found from interfering compounds during AA measurement at pH 7.0. The scan rate effect implied that the occurred process in SPCE was diffusion controlled. It was also shown that the anodic current peaks are linearly proportional to the scan rate, which means the electrocatalytic behavior of AA associated with the surface electron transfer. The results of this study proved that SPCE has good potential as a sensor for detecting AA.

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