Speciation of chromium by dispersive liquid–liquid microextraction followed by laser-induced breakdown spectrometry detection (DLLME–LIBS)

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Título: Speciation of chromium by dispersive liquid–liquid microextraction followed by laser-induced breakdown spectrometry detection (DLLME–LIBS)
Autor/es: Gaubeur, Ivanise | Aguirre Pastor, Miguel Ángel | Kovachev, Nikolay | Hidalgo, Montserrat | Canals, Antonio
Grupo/s de investigación o GITE: Espectroscopía Atómica-Masas y Química Analítica en Condiciones Extremas
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología | Universidad de Alicante. Instituto Universitario de Materiales
Palabras clave: Speciation | DLLME | LIBS
Área/s de conocimiento: Química Analítica
Fecha de publicación: 9-nov-2015
Editor: Royal Society of Chemistry
Cita bibliográfica: Journal of Analytical Atomic Spectrometry. 2015, 30: 2541-2547. doi:10.1039/C5JA00325C
Resumen: In this study, an analytical methodology based on a combination of dispersive liquid–liquid microextraction with laser-induced breakdown spectrometry was evaluated for simultaneous pre-concentration, speciation and detection of Cr. The microextraction procedure was based on the injection of appropriated quantities of 1-undecanol and ethanol into a sample solution containing the complexes formed between Cr(VI) and diethyldithiocarbamate (DDTC). The main experimental factors affecting the complexation and the extraction of metal (pH, DDTC concentration, extractant and volume of disperser solvents) were optimized using a multivariate analysis consisting of two steps: a Plackett–Burman design followed by a Circumscribed Central Composite Design (CCCD). Under optimum microextraction conditions, the analytical figures of merit of the proposed methodology were assessed. The method was finally applied to the analysis of a certified reference material hard drinking water (ERM® CA011a), yielding results in good agreement with the certified value.
Patrocinador/es: National Council for Scientific and Technological Development (Brazil) (CNPq - Science without Borders project no. 245782/2012-5) and São Paulo Foundation Research (FAPESP project no. 2011/19730-3) are acknowledged. This study has been supported by the Government of Spain (CTQ2011-23968) and the Regional Government of Valencia (Spain) (ACOMP/2013/072).
URI: http://hdl.handle.net/10045/51645
ISSN: 0267-9477 (Print) | 1364-5544 (Online)
DOI: 10.1039/C5JA00325C
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: This article is licensed under a Creative Commons Attribution 3.0 Unported Licence
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1039/C5JA00325C
Aparece en las colecciones:INV - SP-BG - Artículos de Revistas

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