Abstract − Analytical Sciences, 36(12), 1547 (2020).
Amperometric Sulfite Sensor Using Electrodecorated Pt Particles onto an Aminated Glassy Carbon Electrode Prepared by Stepwise Electrolysis
Satrio KUNTOLAKSONO,* Chihiro SHIMAMURA,* and Hiroaki MATSUURA*,**
*Department of Life Science & Green Chemistry, Graduate School of Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama 369-0293, Japan
**Department of Life Science & Green Chemistry, Faculty of Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama 369-0293, Japan
**Department of Life Science & Green Chemistry, Faculty of Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama 369-0293, Japan
A novel modified glassy carbon electrode with platinum (Pt)-electrodecorated and nitrogen-containing functional groups was prepared by stepwise electrolysis. The prepared electrode exhibited electrocatalytic activity towards sulfite oxidation that was better than that of a bare glassy carbon electrode. The electrocatalytic activity of sulfite oxidation has been applied to an amperometric sulfite sensor. A favorable linear relationship between the current response (ΔI) and the sulfite concentration up to 500 μM was exhibited. The detection limit was estimated to be 3 μM based on the criterion of a signal-to-noise (S/N) ratio of 3 under optimized conditions. In regards to the reproducibility, the RSD (n = 10) was 8.9% for 80 μM sulfite.
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