Derivatized silver nanoparticles as sensor for ultra-trace nitrate determination based on light scattering phenomenon.
Talanta
; 77(3): 1238-43, 2009 Jan 15.
Article
em En
| MEDLINE
| ID: mdl-19064118
New silver nanoparticles coated with EDTA (EDTA-AgNPs) have been synthesized by citrate reduction method and characterized by UV-vis spectroscopy, molecular fluorescence and scanning electron microscopy (SEM). The derivatized nanoparticles show fluorescent emission and second order scattering (SOS) signals which in presence of nitrate are both attenuated. The SOS decreasing is greater than its fluorescent quenching; considering this fact, a new ultra sensitive methodology using the derivatized silver nanoparticles as sensor for nitrate determination has been developed. Under optimal established conditions, a linear response has been obtained within the range of 6.4 x 10(-4) to 3.0 microg mL(-1) nitrate concentrations, with a detection limit of 1.8 x 10(-4) microg mL(-1). This novel technique provides a sensitive and selective methodology for nitrate determination and has been satisfactorily applied to its quantification in parenteral solutions.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Prata
/
Espectrofotometria
/
Nanopartículas Metálicas
/
Luz
/
Nitratos
Idioma:
En
Revista:
Talanta
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Argentina
País de publicação:
Holanda