Simultaneous Electroanalysis of Peroxyacetic Acid and Hydrogen Peroxide

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• 作者：Mohamed Ismail Awad ; Chokto Harnoode ; Koichi Tokuda ; and Takeo Ohsaka
• 刊名：Analytical Chemistry
• 出版年：2001
• 出版时间：April 15, 2001
• 年：2001
• 卷：73
• 期：8
• 页码：1839 - 1843
• 全文大小：71K
• 年卷期：v.73,no.8(April 15, 2001)
• ISSN：1520-6882

文摘

The electrochemical behavior of peroxyacetic acid (PAA)in the presence of hydrogen peroxide (H₂O₂) has beeninvestigated using cyclic voltammetry and hydrodynamictechniques [rotating disk electrode (RDE) voltammetryand rotating ring-disk electrode (RRDE) voltammetry].The results have been analyzed aiming at simultaneouselectroanalysis of both species. Glassy carbon and goldelectrodes were used for this investigation. It was foundthat the reduction of PAA, as well as H₂O₂, is highlysensitive to the electrode material; for example, at 100mV s^-1, the reduction peak potentials of PAA were 0.2and -1.1 V at gold and glassy carbon electrodes, respectively. The well-separated steady-state limiting currentswere obtained using a gold electrode for the reduction ofboth PAA and H₂O₂ and also a well-defined one for theoxidation of H₂O₂. On the basis of the RDE experiments,good calibration curves were obtained for both speciesover a wide range of their concentrations, for PAA andH₂O₂ in the range of 0.36 to 110 and 0.11 to 34 mM,respectively. The simultaneous and selective electroanalysis of PAA and H₂O₂ in their coexistence is demonstratedfor the first time.