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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/14923

Title: An assessment of the applicability of the use of a plasticised PVC membrane containing pyrochatecol violet complexing reagent for the determination of Cu2 + ions in aqueous solutions by LIBS
Other Titles: Microchemical Journal
Authors: Santos, Klécia M.
Cortez, Juliana
Raimundo Junior, Ivo Milton
Pasquini, Celio
Boa Morte, Elane Santos da
Korn, Maria das Graças Andrade
Keywords: LIBS;PVC membrane;Cu2 + ions;Liquid–solid extraction;Pre-concentration
Issue Date: 2013
Abstract: A plasticised PVC membrane containing pyrochatecol violet as complexing reagent has been used to extract and pre-concentrate Cu2 + ions from aqueous solution, aiming at their determination by Laser Induced Breakdown Spectroscopy. The membrane was prepared from a THF cocktail solution on a cellulose acetate support by the dip-coating technique, providing a homogeneous distribution of the complexing reagent and a thickness of 3 μm. The extraction was straightforwardly performed by immersing the membrane in the Cu2 + sample solution buffered at pH 6.0 with sodium acetate. The extraction time defined the working analytical range (from μg L− 1 to mg L− 1) and a 50-min extraction provided a detection limit of 15 μg L− 1 for Cu2 + ions. The membrane is stable for at least 2 months when stored in a desiccator, allowing in-field extractions, that avoid sampling, storage and transport of the aqueous sample to the laboratory.
Description: Texto completo: acesso restrito. p. 435–438
URI: http://repositorio.ufba.br/ri/handle/ri/14923
ISSN: 0026-265X
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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