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MnO2 nanoparticles mediated colorimetric turn-off determination of ascorbic acid

Abstract

Ascorbic acid (AA) is an esstential micronutrient in human body and participates in vital processes. It can only be supplemented by external intake, making it a significance of determination of AA in food or beverages. In the present work, a MnO2 nanoprticles (MnO2 NPs) based turn-off colorimetry was established for AA determination on the basis of AA-stimulated inhibition of catalytic oxidation. MnO2 NPs were synthesized through a biotemplating method and displayed effective catalytic oxidation activity for oxidatioin of TMB, triggering a chromogenic reaction. Interestingly, the introduction of AA induced the decomposition of MnO2 NPs and as a concequence decreased the colour. Therefore, a sensitive and selective turn-off colorimetry for AA detection was established and satisfactory linear range of 0.5-30 μM with detection limit of 0.28 μM were obtained. This MnO2 NPs-based method was activated via a novel sensing priciple, complementing and facilitating the colorimetry for AA.

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Publication details

The article was accepted on 02 Dec 2019 and first published on 02 Dec 2019


Article type: Paper
DOI: 10.1039/C9NJ05751J
New J. Chem., 2019, Accepted Manuscript

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    MnO2 nanoparticles mediated colorimetric turn-off determination of ascorbic acid

    Q. Wang, X. Ma, H. Lv, A. Wei, T. Wu, L. Ding, X. Ma and C. Ma, New J. Chem., 2019, Accepted Manuscript , DOI: 10.1039/C9NJ05751J

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