Simultaneous Electroanalysis of Peroxyacetic Acid and Hydrogen Peroxide

Abstract

The electrochemical behavior of peroxyacetic acid (PAA) in the presence of hydrogen peroxide (H2O2) has been investigated using cyclic voltammetry and hydrodynamic techniques [rotating disk electrode (RDE) voltammetry and rotating ring-disk electrode (RRDE) voltammetry]. The results have been analyzed aiming at simultaneous electroanalysis of both species. Glassy carbon and gold electrodes were used for this investigation. It was found that the reduction of PAA, as well as H2O2, is highly sensitive to the electrode material; for example, at 100 mV s-1, the reduction peak potentials of PAA were 0.2 and -1.1 V at gold and glassy carbon electrodes, respectively. The well-separated steady-state limiting currents were obtained using a gold electrode for the reduction of both PAA and H2O2 and also a well-defined one for the oxidation of H2O2. On the basis of the RDE experiments, good calibration curves were obtained for both species over a wide range of their concentrations, for PAA and H2O2 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 demonstrated for the first time.

Simultaneous Detection of Peracetic Acid and Hydrogen Peroxide by Amperometry at Pt and Au Electrodes

“…Typically, voltammetric tests were run at a scan rate of 0. As far as the anodic portion of the recorded voltammetric profiles is concerned, it rose in evidence that at both electrode surfaces and at all the pHs explored (0 -10) H 2 O 2 alone displayed an oxidation peak whose height increased linearly with the H 2 O 2 concentration, in agreement with the literature [18]. Table 1 summarizes peak potential values found at three significant pHs.…”

“…Conversely, both peak shape and peak potential observed at Au electrodes for this anodic process were scarcely reproducible, conceivably because gold surface undergoes progressive fouling in the presence of H 2 O 2 (thus losing its activity), as reported elsewhere [18,28]. A satisfactory maintenance of reproducibility could be instead achieved by adopting a cleaning procedure for gold surfaces based on an electrochemical multiscan sequence (usually, no more than 10 scans) at 0.1 Vs À1 between negative ( À 0.7 V) and positive potentials (1.5 V), which resembles closely the procedure suggested previously for H 2 O 2 detection in neutral media [28].…”

“…Peroxyacetic acid (PAA) is a sterilizing agent increasingly used in food industry [1,2] because it provides reduction products (water and acetic acid) displaying no toxic properties, unlike chlorine-based oxidants [1,3,4]. At the same time, it is less expensive with respect to other disinfectants exhibiting a similar low environmental impact, such as ozone and ammonium quaternary salts.…”

Highly sensitive H2O2 sensor based on Co3O4 hollow sphere prepared via a template-free method

“…Thus, the detection of H 2 O 2 is critically important. To date, many techniques, such as spectrophotometry [2,3], chemiluminescence [4][5][6][7], fluorometry [8][9][10][11], titrimetry [12,13] and electrochemistry [14][15][16][17], have been developed to determine H 2 O 2 . In particular, the electrochemical technique has proved to be more direct, rapid, sensitive, selective and inexpensive than the others.…”

Amperometric determination of hydrogen peroxide on surface of a novel PbPCNF-modified carbon-ceramic electrode in acidic medium

“…Many spectroscopic methods such as fluorimetry [5,6], fiber-optic device [7,8], chemiluminescence [9][10][11], and various electrochemical [12][13][14][15] methods have been developed for detection of hydrogen peroxide. Among these methods, the amperometric sensors are especially promising because of their simplicity, high sensitivity and selectivity.…”