Journal
ANALYTICAL METHODS
Volume 14, Issue 20, Pages 1996-2002Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ay00237j
Keywords
-
Funding
- National Key R&D Program of China [2018YFC1604402]
- National Natural Science Foundation of China [21277172]
Ask authors/readers for more resources
Here, we report the preparation of a gold nanoparticle-thioglycolic acid (TGA@AuNP) suspension for label-free colorimetric detection of the organophosphorus pesticide chlorpyrifos. This method has a low detection limit, high selectivity, and fast detection time, and can be applied to detect environmental water samples and tea.
Herein, we report the preparation of a gold nanoparticle-thioglycolic acid (TGA@AuNP) suspension for the label-free colorimetric detection of the organophosphorus pesticide chlorpyrifos. This colorimetric sensor was synthesized by a one-pot method, providing thioglycolic acid (TGA)-modified gold nanoparticles with a negatively charged surface. The formation of TGA@AuNPs was confirmed by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and dynamic light scattering (DLS). In addition, chlorpyrifos was quantitatively determined by UV-vis spectrophotometry. The modification time, TGA concentration, pH, incubation time, temperature, ionic strength, and interference of other pesticides were also investigated. The synthesized TGA@AuNP colorimetric sensor possesses a detection limit as low as 20 mu g L-1 and a selective sensing response, and the detection time is less than 2 minutes. In addition, this method can also be applied to detect various practical samples in life, such as environmental water samples and tea.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available