Colorimetric and fluorescent probes for the rapid detection of profenofos in farmland system.
Food Chem
; 393: 133321, 2022 Nov 01.
Article
en En
| MEDLINE
| ID: mdl-35653988
ABSTRACT
Colorimetric and fluorescent sensors were developed for the detection of profenofos. The colorimetric assay relied on the aggregation of cysteine modified gold nanoparticles (Au-cys) composite caused by the hydrogen bond and Au-S bond between profenofos and Au-cys. The further addition of S, N-doped carbon quantum dots (CDs) (fluorescence quantum yield up to 98%) into the Au-cys system depended on the change of fluorescence intensity of Au-cys-CDs owing to the inner filter effect between Au-cys and CDs. Under the optimal conditions, the sensor exhibits good linearity within 0.2-1.2 mg L-1 and 20-320 µg L-1, and limit of detection of 21.7 µg L-1 and 5.5 µg L-1 in colorimetry and fluorescence mode, respectively. The developed sensor did not only possess favorable selectivity and sensitivity, but also feasibility of usage in the actual detection of profenofos in farmland system samples.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Puntos Cuánticos
/
Nanopartículas del Metal
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Food Chem
Año:
2022
Tipo del documento:
Article