INQUISAL 20936
INSTITUTO DE QUIMICA DE SAN LUIS "DR. ROBERTO ANTONIO OLSINA"
Unidad Ejecutora - UE
artículos
Título:
DERIVATIZED SILVER NANOPARTICLES AS SENSOR FOR ULTRA-TRACE NITRATE DETERMINATION BASED ON LIGHT SCATTERING PHENOMENON
Autor/es:
WANG, CHIEN CHUN; LUCONI, MARTA OLGA; MASI, ADRIANA NOEMÍ; FERNÁNDEZ, LILIANA PATRICIA
Revista:
TALANTA
Editorial:
Elsevier
Referencias:
Año: 2009 vol. 77 p. 1238 - 1243
ISSN:
0039-9140
Resumen:
New silver nanoparticles coated with EDTA (EDTA-AgNPs) have been synthesized by citrate reductionmethod and characterized by UVvis spectroscopy, molecular fluorescence and scanning electronmicroscopy (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 thanits fluorescent quenching; considering this fact, a new ultra sensitive methodology using the derivatizedsilver nanoparticles as sensor for nitrate determination has been developed. Under optimal establishedconditions, a linear response has been obtained within the range of 6.4×10−4 to 3.0gmL−1 nitrate concentrations,with a detection limit of 1.8×10−4 gmL−1. This novel technique provides a sensitive andselective methodology for nitrate determination and has been satisfactorily applied to its quantificationin parenteral solutions.
