| Title : Acidic pH and thiol-driven homogeneous cathodic electrochemiluminescence strategy for determining the residue of organophosphorus pesticide in Chinese cabbage - Yang_2022_Food.Chem_393_133349 |
| Author(s) : Yang Q , Zhao S , Li H , Li F |
| Ref : Food Chem , 393 :133349 , 2022 |
|
Abstract :
Electrochemiluminescent (ECL) sensors for organophosphorus pesticides (OPs) have received considerable attention, whereas complicated electrode's immobilization, response to single hydrolysate and anodic emission correlated with ECL assays restrict their potential utilization. Herein, we developed a homogeneous dual-response cathodic ECL system for highly sensitive and reliable analysis of OP using CdTe QDs as emitters. CdTe QDs, emitting red light, were fabricated through a hydrothermal reaction and generated anodic and cathodic ECL emission upon stimulation of tripropyl amine and K(2)S(2)O(8), respectively. Notably, CdTe QDs-K(2)S(2)O(8) showed a simultaneous response to thiol and acidic pH, and were regarded as a ECL sensor for methidathion with limit of detection of 0.016 ng/mL based on hydrolysis of acetylthiocholine into thiocholine and CH(3)COOH by acetylcholinesterase (AChE) and OPs' inhibition on AChE activity. This sensor also exhibited good practicability to detect methidathion in Chinese cabbage. Overall, the sensor will supply more useful information for ensuring OPs-related food safety. |
| PubMedSearch : Yang_2022_Food.Chem_393_133349 |
| PubMedID: 35691064 |
Yang Q, Zhao S, Li H, Li F (2022)
Acidic pH and thiol-driven homogeneous cathodic electrochemiluminescence strategy for determining the residue of organophosphorus pesticide in Chinese cabbage
Food Chem
393 :133349
Yang Q, Zhao S, Li H, Li F (2022)
Food Chem
393 :133349