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Catalytic Spectrophotometric Determination of Trace H2O2 Using Fe3O4 Nanoparticles as Peroxidase Mimetics

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Abstract:

In the media of pH 2.72 HCl-NaAc, Fe3O4 nanoparticles in size of 10 nm exhibited strong catalytic effect on the slow reaction of H2O2 and the substrate dopamine (DA) to form dark red small molecule polymer particles, which exhibited two absorption peaks at 305nm and 435nm. In the optimum conditions, as the concentration of H2O2 increased, the absorption value at 300 nm increased linearly. The increased absorption intensity (ΔA305nm) was linear to the H2O2 in the range of 0.5-35 μmol/L, with a linear regression equation of ΔA305nm=0.014C +0.043, a relative coefficient of 0.9997 and detection limit of 0.13 μmol/L H2O2, respectively. The proposed method was applied to detect H2O2 samples, with satisfactory results.

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Periodical:

Applied Mechanics and Materials (Volume 319)

Pages:

39-42

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.319.39

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Online since:

May 2013

Authors:

Hui Xiang Ouyang, Ai Hui Liang, Jian Niao Tian, Zhi Liang Jiang

Keywords:

Catalysis, Fe3O4 Nanoparticles, H2O2, Peroxidase Mimetics, Spectrophotometry

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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