| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 744418 | Sensors and Actuators B: Chemical | 2015 | 8 Pages |
•ABT-Ag NPs used as a colorimetric sensor for carbendazim fungicide.•Carbendazim induces the aggregation and color change of ABT-Ag NPs.•ABT-Ag NPs can be used for bare-eye and colorimetric detection of carbendazim.•This method shows good linearity in the range of 10–100 μM, with LOD 1.04 μM.•This method holds great practicality for the detection of carbendazim in real samples.
We have developed a colorimetric method for the sensitive and selective detection of carbendazim fungicide in water and food samples using 4-aminobenzenethiol functionalized silver nanoparticles (ABT-Ag NPs) as a colorimetric sensor. The synthesized ABT-Ag NPs were characterized by UV–visible spectroscopy, FT-IR, dynamic light scattering (DLS) and transmission electron microscopic (TEM) techniques. The ABT-Ag NPs acted as a probe for binding of carbendazim through strong ion-pair and π–π interactions that causes to form a large conjugate network, resulting a color change from yellow to orange, which can be easily seen by naked eye. The characteristic surface plasmon resonance (SPR) peak of ABT-Ag NPs at 397 nm is red-shifted to 510 nm, which confirms that the carbendazim induces the aggregation of ABT-Ag NPs. Under optimum conditions, the absorbance ratio at A510/A397 is related linearly to the concentration of carbendazim in the range of 10–100 μM, with a detection limit of 1.04 μM. This colorimetric method has been successfully utilized to detect carbendazim in environmental water and food samples with the recoveries ranges from 97% to 100%. The proposed colorimetric assay exhibits good reproducibility and accuracy, providing a simple and rapid method for the analysis of carbendazim in environmental water and food samples.
Graphical abstractWe report a novel nanoparticles-based colorimetric method for the sensitive detection of carbendazim fungicide using 4-aminobenzenethiol functionalized silver nanoparticles (ABT-Ag NPs) as a colorimetric sensor. The presence of carbendazim induces the aggregation of ABT-Ag NPs, resulting a color change from yellow to orange, which can be easily seen with naked eye. The characteristic surface plasmon resonance (SPR) band of ABT-AgNPs at 397 nm decreases, and simultaneously, a new absorption band appears at 510 nm.Figure optionsDownload full-size imageDownload as PowerPoint slide
