Voltammetric method for the determination of H2O2 in rainwater |
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Authors: | Janine Lagrange and Philippe Lagrange |
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Institution: | (1) Laboratoire de Cinétique et Analyse, EHICS, URA 405 au CNRS, 1, rue Blaise Pascal, F-67000 Strasbourg, France |
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Abstract: | Summary Presented below is an electrochemical method for the determination of hydrogen peroxide levels in the atmospheric liquid water. The hydrogen peroxide concentration is determined by a voltammetric method involving a rotating disk electrode. The oxidation limiting current at +0.4 V/SCE is proportional to the concentration of hydrogen peroxide found in 1 mol/l KNO3 containing a phosphate buffer, pH 7.5. An analytical blank is prepared in situ by addition of catalase enzyme to avoid interferences. The detection limit obtained is 5×10–9 mol/l. |
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