INQUISAL   20936
INSTITUTO DE QUIMICA DE SAN LUIS "DR. ROBERTO ANTONIO OLSINA"
Unidad Ejecutora - UE
artículos
Título:
Optimization of methods to assess levels of As, Bi, Sb and Se in airborne particulate matter by FI-HG-ICP OES
Autor/es:
MARIANELA SAVIO; PABLO H. PACHECO; LUIS D. MARTINEZ; PATRICIA SMICHOWSKI; RAUL A. GIL
Revista:
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Año: 2010 p. 1343 - 1347
ISSN:
0267-9477
Resumen:
A study was undertaken to assess the level of selected trace elements namely, As, Bi, Sb and Se in airborne particulate matter collected on ash-free glass-fibre filters from urban and industrial areas of Argentina. For sample digestion, a simple acid treatment with HCl + HF is proposed with the aim to minimize contamination and reduce sample treatment steps. A flow injection-hydride generation system in combination with inductively coupled plasma optical emission spectrometry was used. While, Se and Bi could be determined directly from the digest, As and Sb needed a pre-reduction with KI, and H3BO3 to avoid the interference of F- ions that may cause losses via volatile compounds such as AsF3 and Sb(v) complexes. Limits of detection (3σ) of 0.3 ng m-3 for As; 0.09 ng m-3 for Bi, and 0.1 ng m-3 for Sb and Se were achieved. Precision resulted in better than 6.1% accuracy for all the elements determined. Accuracy test was assessed by means of the certified reference material, NIST 1648 (urban particulate matter).