4.7 Article

Colorimetric copper (II) ions detection in aqueous solution based on the system of 3′3′5′5′-tetramethylbenzidine and AgNPs in the presence of Na2S2O3

Journal

Publisher

VIETNAM NATL UNIV
DOI: 10.1016/j.jsamd.2022.100420

Keywords

Colorimetric assay; Copper ions; TMB; Silver nanoparticles; Thiosulfate

Funding

  1. Department of Education of Hebei Province [QN2019230]
  2. Research Fund for Doctoral Programs of Hebei University of Science and Technology [1181267]

Ask authors/readers for more resources

A colorimetric copper (II) ion detection system based on the oxidization reaction of TMB and AgNPs was designed. The system exhibited high selectivity for Cu2+ ions and showed promise for monitoring aqueous quality.
Herein, a colorimetric copper (II) ion (Cu2+) detection system based on the oxidization reaction of 3'3'5'5'-tetramethylbenzidine (TMB) and Ag(S2O3)(2)(3-) (in aqueous solution) was designed. The detection system comprised TMB, silver nanoparticles (AgNPs) and thiosulfate (S2O32-). It was observed that AgNPs were unable to oxidize TMB to a blue color. While, Cu2+ ions could effectively catalyze the S2O32--leaching system, thereby converting AgNPs to Ag(S2O3)(2)(3)(-). Similar to Ag (I), Ag(S2O3)(2)(3-) catalyzed the color reaction of TMB. The colorimetric copper (II) ion (Cu2+) detection system was fabricated. Results showed that the optimal amounts of TMB and Na2S2O3 were 800 and 400 mu M, respectively, and the reaction time and temperature were 40 min and 25 degrees C, respectively. The range of curvature tendency was 1-100 mu M, with a limit of detection of 100 nM. The detection system exhibited a high selectiveness for copper ions in an aqueous solution. Furthermore, this system shows remarkable promise for monitoring the aqueous quality. (C) 2022 Vietnam National University, Hanoi. Published by Elsevier B.V.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available