Artículo
Fast spectrophotometric determination of fluoride in ground waters by flow injection using partial least-squares calibration
Arancibia, Juan Alberto
; Rullo, Anabel; Olivieri, Alejandro Cesar
; Di Nezio, Maria Susana; Pistonesi, Marcelo Fabian; Lista, Adriana Guillermina; Fernández Band, Beatriz Susana
Fecha de publicación:
06/2004
Editorial:
Elsevier Science
Revista:
Analytica Chimica Acta
ISSN:
0003-2670
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The presence of sulphate constitutes a serious interference in the usual zirconium lake-based spectrophotometric method for the determination of fluoride in water. In this report, full spectral data have been recorded for the zirconium lake of 2-(parasulfophenylazo)-1,8-dihydroxy-3,6-naphthalene- disulfonate (SPADNS) in the simultaneous presence of fluoride and sulphate, as obtained with a flow injection system with a diode-array detector. The information has been processed with partial least-squares (PLS) multivariate calibration. Adequate modeling using a sixteen-sample calibration set allows fluoride to be determined in ground waters by the automated flow injection method, even in the presence of sulphate in concentrations up to 1000 mg l -1. In the calibration range 0-1.50 mg l-1 for fluoride, the limit of detection is 0.1 mg l-1. The fluoride contents in real samples, as determined with the present method, were satisfactorily compared with those provided by ion selective potentiometry.
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Articulos(INQUISUR)
Articulos de INST.DE QUIMICA DEL SUR
Articulos de INST.DE QUIMICA DEL SUR
Articulos(IQUIR)
Articulos de INST.DE QUIMICA ROSARIO
Articulos de INST.DE QUIMICA ROSARIO
Citación
Arancibia, Juan Alberto; Rullo, Anabel; Olivieri, Alejandro Cesar; Di Nezio, Maria Susana; Pistonesi, Marcelo Fabian; et al.; Fast spectrophotometric determination of fluoride in ground waters by flow injection using partial least-squares calibration; Elsevier Science; Analytica Chimica Acta; 512; 1; 6-2004; 157-163
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