期刊
ANALYTICA CHIMICA ACTA
卷 629, 期 1-2, 页码 1-5出版社
ELSEVIER
DOI: 10.1016/j.aca.2008.09.009
关键词
Hydrogen peroxide; Spectrophotometry; Methyl orange; Fenton reaction
资金
- National Science Foundation of China [20877031, 20677019]
In this study, a sensitive and rapid method for hydrogen peroxide (H2O2) determination has been developed with the aid of oxidation decolorization of methyl orange (MO) by using Fenton reactions, because the decolorization extent of MO solution (at the maximum absorption wavelength of 507 nm) is proportion to the concentration of H2O2. Under optimum conditions, this spectrophotometric method for the H202 analysis yields a dynamic range of H2O2 concentration from 5.0 x 10(-7) to 1.0 x 10(-1) mol L-1 (r = 0.997) and a detection limit (3 sigma/k) of 2.0 x 10(-7) mol L-1. This method for the determination of H2O2 (0.04 mmol L-1) is able to tolerate the interference from NaCl (0-5.0 mmol L-1), Na2SO4 (0-5.0 mmol L-1), MgCl2 (0-5.0 mmol L-1), sodium humate (0-0.1 mmol L-1), benzene (0-0.2 mmol L-1), toluene (0-0.2 mmol L-1), chlorobenzene (0-0.2 mmol L-1) and chloroform (0-0.2 mmol L-1). The analysis results for practical rainwater samples are in good agreement with the classical N,N-diethyl-p-phenylenediamine (DPD) method for H2O2 determination. (C) 2008 Elsevier B.V. All rights reserved.
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