info:eu-repo/semantics/article
Preconcentration and elimination of matrix effects in XRF determinations of rare earth elements by preparing a thin film through chemofiltration
Fecha
2001-02-20Registro en:
de Vito, Irma Esther; Olsina, Roberto Antonio; Masi, Adriana Noemi; Preconcentration and elimination of matrix effects in XRF determinations of rare earth elements by preparing a thin film through chemofiltration; Royal Society of Chemistry; Journal of Analytical Atomic Spectrometry; 16; 3; 20-2-2001; 275-278
0267-9477
1364-5544
CONICET Digital
CONICET
Autor
de Vito, Irma Esther
Olsina, Roberto Antonio
Masi, Adriana Noemi
Resumen
Trace rare earth elements (REE) can be enriched by collecting them on a filter after they have formed their complexes with 2,2′-(1,8-dihydroxy-3,6-disulfonaphthylene-2,7-bisazo) bisbenzenearsonic acid (Arsenazo III) through a process called chemofiltration. The filter, which constitutes a thin film, is passed directly to the X-ray fluorescence (XRF) spectrometer, eliminating, in this manner, the interelemental effects produced in XRF determinations. High preconcentration factors and low detection limits are obtained: 18.3 ng mL-1 for Sm, 17.5 ng mL-1 for Eu and 34 ng mL-1 for Gd. The method was applied to the determination of these elements in NIST standard reference glasses with very good precision.