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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%.

PRECONCENTRACIÓN DE PLOMO EN MUESTRAS SINTÉTICAS POR EXTRACCIÓN CON TRITÓN X-114 EN EL PUNTO DE NUBE Y ANÁLISIS POR ABSORCIÓN ATÓMICA (EAAF)