Journal Highlight: Rapid and sensitive colorimetric detection of ascorbic acid in food based on the intrinsic oxidase-like activity of MnO2 nanosheets

Skip to Navigation

Ezine

  • Published: Mar 12, 2018
  • Author: spectroscopyNOW
  • Channels: UV/Vis Spectroscopy
thumbnail image: Journal Highlight: Rapid and sensitive colorimetric detection of ascorbic acid in food based on the intrinsic oxidase-like activity of MnO<sub>2</sub> nanosheets

A colorimetric sensor for the rapid, selective detection of ascorbic acid in aqueous solutions such as fruit, juice and pharmaceutical samples is based on single-layered MnO2 nanosheets and 3,3',5,5'-tetramethylbenzidine.

Rapid and sensitive colorimetric detection of ascorbic acid in food based on the intrinsic oxidase-like activity of MnO2 nanosheets

Luminescence, 2018, 33, 145-152
Liuying He, Feiyang Wang, Ying Chen and Yueying Liu

Abstract: In this paper, we report a colorimetric sensor for the rapid, selective detection of ascorbic acid (AA) in aqueous solutions. Single-layered MnO2 nanosheets were established as an artificial oxidase; consequently colorless 3,3',5,5'-tetramethylbenzidine (TMB) was oxidized to a blue product (oxTMB), with increase in absorbance at 650 nm. The absorbance of the reaction system decreased after introduction AA, which reduced MnO2 into Mn2+. Under optimum conditions, a detection limit of 62.81 nM for AA in aqueous solutions could be achieved. The linear response range for AA was 0.25–30 μM with a correlation coefficient of 0.996. Importantly, the MnO2 nanosheet–TMB chromogenic reaction exhibited great selectivity as there was no interference from other metal ions, amino acids and small biological molecules. The proposed colorimetric sensing of AA could be applied for fruit, juice and pharmaceutical samples. Moreover, the proposed sensor showed satisfying performance, including low cost, easy preparation, rapid detection, and good biocompatibility.

  • This paper is free to view for all users registered on spectroscopyNOW.com until the end of May 2018.
    After this time, you can purchase it using Pay-Per-View on Wiley Online Library.

Follow us on Twitter!

Social Links

Share This Links

Bookmark and Share

Microsites

Suppliers Selection
Societies Selection

Banner Ad

Click here to see
all job opportunities

Most Viewed

Copyright Information

Interested in separation science? Visit our sister site separationsNOW.com

Copyright © 2018 John Wiley & Sons, Inc. All Rights Reserved