Journal
MICROCHIMICA ACTA
Volume 174, Issue 1-2, Pages 183-189Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-011-0600-9
Keywords
Fe3O4 magnetic nanoparticle; Peroxidase mimic; Hydrogen peroxide; Amperometric
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Funding
- National Natural Science Foundation of China [90713022]
- National Key Basic Research Development Project of China [2007CB714500]
- Chinese Academy of Sciences [KJCX2-YW-H11]
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A sensor for hydrogen peroxide is described that is based on an indium tin oxide electrode modified with Fe3O4 magnetic nanoparticles which act as a mimic for the enzyme peroxidase and greatly improve the analytical performance of the sensor. The amperometric current is linearly related to the concentration of H2O2 in the range from 0.2 mM to 2 mM, the regression equation is y = -0.5-1.82x, the correlation coefficient is 0.998 (n = 3), and the detection limit is 0.01 mM (S/N = 3). The sensor exhibits favorable selectivity and excellent stability.
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