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

• Autores: Zegarra Pisconti, Marixa, Cjuno Huanca, Jesús
• Formato: artículo
• Fecha de Publicación: 2015
• Institución: Sociedad Química del Perú
• Repositorio: Revista de la Sociedad Química del Perú
• Lenguaje: español
• OAI Identifier: oai:rsqp.revistas.sqperu.org.pe:article/5
• Enlace del recurso: http://revistas.sqperu.org.pe/index.php/revistasqperu/article/view/5
• Nivel de acceso: acceso abierto
• Materia: Preconcentration; surfactant; dithizone; critical micelle concentration (CMC); cloud point temperature; Triton X-114; EAAF; recovery; Preconcentración; surfactante; ditizona; concentración micelar crítica (CMC); temperatura de punto de nube; Tritón X-114; recuperación

A methodology was developed about lead preconcentration in water samples that were addeddithizone 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. Thecentrifuged system gave a precipitate with high concentrations of Pb (II) that was measuredby atomic absorption spectroscopy with flame (EAAF). The method has proved feasible tobe implemented as a method of preconcentration and analysis of Pb in aqueous samples withconcentrations less than 1 ppm. Several parameters were evaluated to obtain a percentagerecovery of 89.8%.