Next Article in Journal
Effects of Pre-Treatments on Bioactivity of High-Purity Titanium
Previous Article in Journal
Smart Metamaterial Based on the Simplex Tensegrity Pattern
Open AccessArticle

Fabrication of Metal-Substituted Polyoxometalates for Colorimetric Detection of Dopamine and Ractopamine

1
Jilin Provincial Key Laboratory of Wooden Materials Science and Engineering, Beihua University, Jilin 132013, China
2
Key Lab of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun 130024, China
3
Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON M5S 3B3, Canada
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(5), 674; https://doi.org/10.3390/ma11050674
Received: 4 April 2018 / Revised: 22 April 2018 / Accepted: 23 April 2018 / Published: 26 April 2018
A novel colorimetric detection method based on the peroxidase-like activity of metal-substituted polyoxometalates (POMs) of SiW9M3 (M = Co2+, Fe3+, Cu2+, Mn2+) has been established. POMs can catalyze oxidation of dopamine (DA) and ractopamine (RAC) by H2O2 in aqueous solutions. SiW9Co3-based POMs detect DA at concentrations as low as 5.38 × 10−6 mol·L−1 simply by observation of the color change from colorless to orange using the naked eye. RAC is detected by observing the change from colorless to slight red by SiW9Cu3 with a detection limit of 7.94 × 10−5 mol·L−1. This study shows that colorimetric DA and RAC detection using SiW9Co3 and SiW9Cu3 is highly selective and sensitive as well as visually observable. View Full-Text
Keywords: polyoxometalates; peroxidase-like; colorimetric detection; dopamine; ractopamine polyoxometalates; peroxidase-like; colorimetric detection; dopamine; ractopamine
Show Figures

Figure 1

MDPI and ACS Style

Duan, X.; Bai, Z.; Shao, X.; Xu, J.; Yan, N.; Shi, J.; Wang, X. Fabrication of Metal-Substituted Polyoxometalates for Colorimetric Detection of Dopamine and Ractopamine. Materials 2018, 11, 674.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop