SciELO - Scientific Electronic Library Online

 
vol.22 número3Simple route for the synthesis of copper hydroxy saltsDry washing in biodiesel purification: a comparative study of adsorbents índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

Links relacionados

Compartir


Journal of the Brazilian Chemical Society

versión impresa ISSN 0103-5053

Resumen

SANTOS, Denilson S. S et al. Determination of copper, iron, lead and zinc in gasoline by sequential multi-element flame atomic absorption spectrometry after solid phase extraction. J. Braz. Chem. Soc. [online]. 2011, vol.22, n.3, pp.552-557. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50532011000300020.

A procedure was developed for determination of copper, iron, lead and zinc in gasoline. The procedure was based on the preconcentration of metals using a resin modified with 3,4-dihydroxybenzoic acid (XAD-DHB), followed by desorption with an acid eluent. The components in the eluate were then determined by fast sequence flame atomic absorption spectrometry (FS-FAAS). The gasoline samples were prepared as microemulsions by mixing 80 mL of sample with 17 mL of propan-1-ol and 3 mL of a buffer solution (pH 10). The chemical and physical variables influencing the extraction were optimized. The LODs obtained were 2.2 µg L-1 Fe, 3.1 µg L-1 Cu, 2.3 µg L-1 Pb and 2.6 µg L-1 Zn. The RSDs ranged from 5.8 to 9.7% in samples spiked with 0.05 and 0.1 mg L-1 of each metal and recoveries varied from 82 to 99%. The procedure was suitable for determination of the analytes at µg L-1 levels in gasoline samples collected from several gas stations in Salvador, State of Bahia, Brazil.

Palabras clave : preconcentration; metal; gasoline; solid phase extraction; FS-FAAS.

        · resumen en Portugués     · texto en Inglés     · Inglés ( pdf epdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons