INQUISAL 20936
INSTITUTO DE QUIMICA DE SAN LUIS "DR. ROBERTO ANTONIO OLSINA"
Unidad Ejecutora - UE
artículos
Título:
Determination of trace chromium(VI) in drinking water using X-ray fluorescence spectrometry after solid-phase extraction
Autor/es:
PEDRO R. ARANDA; SUSANA MOYANO; LUIS D. MARTINEZ; IRMA E. DE VITO
Revista:
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Editorial:
SPRINGER HEIDELBERG
Referencias:
Año: 2010 vol. 398 p. 1043 - 1048
ISSN:
1618-2642
Resumen:
Abstract A new, simple, and selective method for preconcentrationand determination of Cr(VI) in aqueous samples.After adsorption in batch mode on Aliquat 336-AC,determinations were made directly on the solid by X-rayfluorescence spectrometry, which had the advantage of notrequiring the step of elution of the chromium retained. Theenrichment factor was calculated considering that the tabletsobtained from 10 mL solution of Cr(VI) (1000 μgL-1) had afinal thickness of 0.64 mm and a diameter of 16.7 mm; thevolume deposited on the pellet was 0.14 cm3. Thepreconcentration factor obtained was 71-fold, which washighly satisfactory for chromium trace analysis by XRF.Finally, the method was successfully applied to the determinationof Cr(VI) in drinking water samples.
