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Analytical Letters Volume 34, 2001 - Issue 8
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Original Articles

FLUOROMETRIC DETERMINATION OF PEROXIDES IN AN HPLC SYSTEM

Bin Qi State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, 210093, P. R. China
,
Y. Z. Zhu State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, 210093, P. R. China
,
Min Hu The State Key Laboratory of Environmental Simulation and Pollution Control, Center of Environmental Sciences, Peking University, Beijing, 100871, P. R. China
,
Yuanhang Zhang The State Key Laboratory of Environmental Simulation and Pollution Control, Center of Environmental Sciences, Peking University, Beijing, 100871, P. R. China
&
Xiaoyan Tang The State Key Laboratory of Environmental Simulation and Pollution Control, Center of Environmental Sciences, Peking University, Beijing, 100871, P. R. China
Pages 1247-1254 | Published online: 02 Feb 2007
 
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Abstract

Hemin was used to substitute for horseradish peroxidase (HRP) as catalyst with p-hydroxyphenyl acetic acid (PHPAA) as substrate for post-column detection of H2O2 and methyl hydroperoxide (CH3OOH, MHP) in an HPLC system. In a hemin-catalyzed system, post-column reaction and fluorescence measurement can both be conducted optimally at a pH of ∼10.5. Hydroxymethyl hydroperoxide (HOCH2OOH, HMHP) and bis(hydroxymethyl) peroxide (HOCH2OOCH2OH, BMHP) will rapidly be converted to H2O2 in alkaline solution and can also be detected. The HPLC system is optimized for the analysis of H2O2 and MHP. Reproducibilities are better than 5% for H2O2 and MHP. The detection limits in aqueous solution are 9 nM for H2O2 and 200 nM for MHP.

ACKNOWLEDGMENTS

We are indebted to professor Li Yuanzong, department of chemistry of Peking University, for suggestions and encouragement.

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