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Simultaneous electroanalysis of peroxyacetic acid and hydrogen peroxide
M I Awad1, C Harnoode, K Tokuda
1Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan.
This study demonstrates the first simultaneous electroanalysis of peroxyacetic acid (PAA) and hydrogen peroxide (H2O2). A gold electrode enabled selective detection of both analytes, crucial for environmental and industrial monitoring.
Area of Science:
- Electrochemistry
- Analytical Chemistry
Background:
- Peroxyacetic acid (PAA) and hydrogen peroxide (H2O2) are widely used oxidants.
- Simultaneous detection of PAA and H2O2 is challenging due to their similar chemical properties.
Purpose of the Study:
- To develop a method for the simultaneous and selective electroanalysis of PAA and H2O2.
- To investigate the electrochemical behavior of PAA and H2O2 at different electrode materials.
Main Methods:
- Cyclic voltammetry (CV)
- Rotating disk electrode (RDE) voltammetry
- Rotating ring-disk electrode (RRDE) voltammetry
- Glassy carbon and gold electrodes were employed.
Main Results:
- Electrode material significantly influences the reduction potentials of PAA and H2O2.
- A gold electrode provided well-separated limiting currents for PAA and H2O2 reduction and H2O2 oxidation.
- Good linear calibration curves were achieved for PAA (0.36–110 mM) and H2O2 (0.11–34 mM).
Conclusions:
- Simultaneous and selective electroanalysis of PAA and H2O2 in mixtures is feasible.
- The developed electrochemical method offers a sensitive and reliable approach for quantifying both species.
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