Fluorometric methods for determination of H2O2, glucose and cholesterol by using MnO2 nanosheets modified with 5-carboxyfluorescein. View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2019-05

AUTHORS

Ting Han, Shengmei Zhu, Sicheng Wang, Baojuan Wang, Xiaojun Zhang, Guangfeng Wang

ABSTRACT

A fluorescent probe for H2O2 is described. It is composed of MnO2 nanosheets and 5-carboxyfluorescein and was characterized by fluorescence, transmission electron microscopy, ultraviolet-visible absorption spectra, energy dispersive X-ray and Fourier transform infrared spectroscopy. The probe, with fluorescence excitation/emission maxima at 490/518 nm, responds to H2O2 in the 1 to 200 μM concentration range and has a 0.33 μM detection limit. The probe was used in enzymatic assays for glucose and cholesterol by using the respective oxidases which produce H2O2. Responses are linear in the concentration range from 0.5 to 200 μM in case of glucose, and from 1 to 300 μM in case of cholesterol. The method was applied to quantify glucose and cholesterol in (spiked) serum samples. Graphical abstract Schematic presentation of the principle based on hydrogen peroxide-induced degradation of MnO2 nanosheet-FAM complex for detection of H2O2 (a), glucose and cholesterol (b). More... »

PAGES

269

Journal

TITLE

Microchimica Acta

ISSUE

5

VOLUME

186

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00604-019-3381-1

DOI

http://dx.doi.org/10.1007/s00604-019-3381-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1113283364

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30955099


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41 schema:description A fluorescent probe for H<sub>2</sub>O<sub>2</sub> is described. It is composed of MnO<sub>2</sub> nanosheets and 5-carboxyfluorescein and was characterized by fluorescence, transmission electron microscopy, ultraviolet-visible absorption spectra, energy dispersive X-ray and Fourier transform infrared spectroscopy. The probe, with fluorescence excitation/emission maxima at 490/518 nm, responds to H<sub>2</sub>O<sub>2</sub> in the 1 to 200 μM concentration range and has a 0.33 μM detection limit. The probe was used in enzymatic assays for glucose and cholesterol by using the respective oxidases which produce H<sub>2</sub>O<sub>2</sub>. Responses are linear in the concentration range from 0.5 to 200 μM in case of glucose, and from 1 to 300 μM in case of cholesterol. The method was applied to quantify glucose and cholesterol in (spiked) serum samples. Graphical abstract Schematic presentation of the principle based on hydrogen peroxide-induced degradation of MnO<sub>2</sub> nanosheet-FAM complex for detection of H<sub>2</sub>O<sub>2</sub> (a), glucose and cholesterol (b).
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