Determination of melamine in milk based on ß-cyclodextrin modified carbon nanoparticles via host-guest recognition.
Food Chem
; 338: 127769, 2021 Feb 15.
Article
en En
| MEDLINE
| ID: mdl-32862067
ABSTRACT
Illegal addition of melamine (MEL) to milk has caused serious food safety accident. It is urgent to develop a highly sensitive method for detecting MEL in milk. ß-Cyclodextrin with inner hydrophobic and outer hydrophilic cavities have been widely used in smart sensors design. In this study, an "ON-OFF-ON" sensor for MEL detection was constructed based on ß-cyclodextrin modified carbon nanoparticles (ß-CD-CNPs). The sensor is switched "OFF" when Fe3+ interacts with ß-CD-CNPs and switched "ON" when MEL replaces Fe3+. Fluorescence recovery of ß-CD-CNPs exhibits good linear correlations with MEL concentration ranging from 10.00 ng/mL ~ 180.00 ng/mL and 180.00 ~ 1000.00 ng/mL, the detection limit is 6.82 ng/mL. The sensor was applied to analysis melamine in milk samples with recovery between 94.80% ~ 102.05%, and RSD bellow 12.61%. The results show that this method can meet the requirements of real sample analysis.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Triazinas
/
Carbono
/
Leche
/
Beta-Ciclodextrinas
/
Nanopartículas
/
Análisis de los Alimentos
Límite:
Animals
Idioma:
En
Revista:
Food Chem
Año:
2021
Tipo del documento:
Article
País de afiliación:
China