LEAD PRECONCENTRATION IN SYNTHETIC SAMPLES WITH TRITON X-114 IN THE CLOUD POINT EXTRACTION AND ANALYSIS BY ATOMIC ABSORPTION (EAAF)

  • Marixa Zegarra Pisconti Autor
  • Jesús Cjuno Huanca Autor
DOI: https://doi.org/10.37761/rsqp.v81i1.5
Keywords: Preconcentration, surfactant, dithizone, critical micelle concentration (CMC), cloud point temperature, Triton X-114, EAAF, recovery

Abstract

A methodology was developed about lead preconcentration in water samples that were added
dithizone as complexing agent, previously dissolved in the nonionic surfactant Triton X-114,
until the formation of the critical micelle concentration and the cloud point temperature. The
centrifuged system gave a precipitate with high concentrations of Pb (II) that was measured
by atomic absorption spectroscopy with flame (EAAF). The method has proved feasible to
be implemented as a method of preconcentration and analysis of Pb in aqueous samples with
concentrations less than 1 ppm. Several parameters were evaluated to obtain a percentage
recovery of 89.8%.

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Author Biographies

Marixa Zegarra Pisconti, Autor

UPG, Facultad de Química e Ingeniería Química, UNMSM. Av. Universitaria /Av. Germán Amézaga s/n Lima-1,
Perú. 

Jesús Cjuno Huanca, Autor

Departamento Académico de Fisicoquímica, FQIQ, UNMSM.

Published
2015-03-31
Issue
Vol. 81 No. 1 (2015): Journal of the Chemical Society of Peru
Section
Artículos

Copyright (c) 2015 Sociedad Química del Perú

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