A facile colorimetric method for highly sensitive ascorbic acid detection by using CoOOH nanosheetsElectronic supplementary information (ESI) available. See DOI: 10.1039/c8ay00841h

A facile colorimetric method for highly sensitive ascorbic acid detection by using CoOOH... In this work, based on a fast redox reaction between CoOOH nanosheets and AA, a very simple and highly sensitive colorimetric assay was developed to detect AA in buffer and real samples. In the detection system, CoOOH nanosheets exhibit a strong ultraviolet-visible (UV-vis) absorption peak at around 430 nm with an observable yellowish-brown color. The presence of AA reduces the CoOOH nanosheets to Co2+ ions and subsequently weakens the color of the solution, which results in a dramatic decrease of the absorption signal. The assay showed a good linear range from 0.25 M to 60 M with a detection limit of 57 nM for AA. Meanwhile, the detection system also exhibited high selectivity against other electrolytes and biomolecules. More importantly, this procedure is very simple, and the entire procedure can be finished within 15 min. This method has also been successfully applied to the detection of AA in vitamin C tablets and beverages with reliable results. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Analytical Methods Royal Society of Chemistry

A facile colorimetric method for highly sensitive ascorbic acid detection by using CoOOH nanosheetsElectronic supplementary information (ESI) available. See DOI: 10.1039/c8ay00841h

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Publisher
The Royal Society of Chemistry
Copyright
This journal is © The Royal Society of Chemistry
ISSN
1759-9660
eISSN
1759-9679
D.O.I.
10.1039/c8ay00841h
Publisher site
See Article on Publisher Site

Abstract

In this work, based on a fast redox reaction between CoOOH nanosheets and AA, a very simple and highly sensitive colorimetric assay was developed to detect AA in buffer and real samples. In the detection system, CoOOH nanosheets exhibit a strong ultraviolet-visible (UV-vis) absorption peak at around 430 nm with an observable yellowish-brown color. The presence of AA reduces the CoOOH nanosheets to Co2+ ions and subsequently weakens the color of the solution, which results in a dramatic decrease of the absorption signal. The assay showed a good linear range from 0.25 M to 60 M with a detection limit of 57 nM for AA. Meanwhile, the detection system also exhibited high selectivity against other electrolytes and biomolecules. More importantly, this procedure is very simple, and the entire procedure can be finished within 15 min. This method has also been successfully applied to the detection of AA in vitamin C tablets and beverages with reliable results.

Journal

Analytical MethodsRoyal Society of Chemistry

Published: May 29, 2018

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