Highly selective and sensitive gold nanoparticle-based colorimetric assay for PO4³â» in aqueous solution.
Talanta
; 106: 73-8, 2013 Mar 15.
Article
em En
| MEDLINE
| ID: mdl-23598097
ABSTRACT
A rapid, simple and real-time colorimetric assay for detecting phosphate anions (PO4(3-)) in aqueous solution was developed. The method was based on a novel functionalized gold nanoparticles (MPTP-Zn-AuNPs), which was synthesized by the ligand-exchange reaction of 4'-(4-mercaptophenyl)-2,2'6',2â³-terpyridine zinc(II) complex (MPTP-Zn) with citrate-stabilized aqueous AuNPs. The strong coordination between MPTP-Zn-AuNPs and PO4(3-) anion gave rise to a color change from wine-red to blue-gray that was discernible by the naked eye and an easily measurable alteration in the absorption spectrum of the particles in aqueous solution. And the new technique exhibited the high selectivity for PO4(3-) over 11 other anions and could be used to determine PO4(3-) with a detection limit of 11 ppm.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fosfatos
/
Colorimetria
/
Nanopartículas Metálicas
/
Ouro
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article