Sensitive and selective detection of tetracycline using fluorescence-enhanced Eu(III)-functionalized silver nanoparticles with homocysteine.
Chemosphere
; 364: 143278, 2024 Sep.
Article
in En
| MEDLINE
| ID: mdl-39243907
ABSTRACT
Utilizing metal luminescence enhancement to design fluorescent probes is a very sensible strategy. Herein, a fluorescent probe based on europium (III)-functionalized silver nanoparticles-conjugated homocysteine (AgNPs-Hcy-Eu3+) was proposed for the selective and sensitive detection of tetracycline (TC). In this probe, Eu(III) was employed as the detection signal unit for TC, while AgNPs-Hcy was used as the ligand of fluorescence enhancement. When TC exists, it can bind to Eu3+ immobilized in AgNPs-Hcy, leading to an enhanced fluorescence signal from Eu3+ through energy transfer. Under optimal conditions, the fluorescence intensity of AgNPs-Hcy-Eu3+ increased linearly with increasing TC concentration in the range of 0.1-30 µM (R2 = 0.9964). The fluorescent probe own fluorescence enhancement, paving the way for sensitive detection with a low detection limit of 0.083 µM. It also has good selectivity for common antibiotics and anions. This work can be applied to the determination of TC in tap water and milk with recoveries of 94-98.5%. We expect AgNPs-Hcy-Eu3+ to have potential applications in environmental testing and food safety.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Silver
/
Tetracycline
/
Milk
/
Europium
/
Metal Nanoparticles
/
Fluorescent Dyes
/
Homocysteine
Limits:
Animals
Language:
En
Journal:
Chemosphere
Year:
2024
Document type:
Article
Country of publication:
Reino Unido