Visual detection of melamine in milk products by label-free gold nanoparticles.
Talanta
; 82(5): 1654-8, 2010 Oct 15.
Article
en En
| MEDLINE
| ID: mdl-20875559
ABSTRACT
A simple, rapid, field-portable colorimetric method for the detection of melamine based on melamine-induced color change of label-free gold nanoparticles (Au NPs) was developed in this study. Melamine can induced the aggregation of Au NPs and results in the color change from wine-red to purple, which provided a platform for rapid and field-portable colorimetric detection of melamine. The proposed method can be used to detect melamine in liquid milk and infant formula with a detection limit of 1.0 and 4.2ppm, respectively, within 30min by naked eyes observation without the aid of any advanced instrument and the need of any complex pretreatment, and detect as low as 0.15ppm of melamine in liquid milk and 2.5ppm of melamine in infant formula with UV-vis-spectroscopy. The proposed method is promising for on-site screening of melamine adulterant in milk products.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Triazinas
/
Contaminación de Alimentos
/
Fórmulas Infantiles
/
Leche
/
Nanopartículas del Metal
/
Oro
Tipo de estudio:
Diagnostic_studies
Límite:
Animals
/
Humans
/
Infant
Idioma:
En
Revista:
Talanta
Año:
2010
Tipo del documento:
Article
País de afiliación:
China