The determination of V and Mo by dispersive liquid–liquid microextraction (DLLME) combined with laser-induced breakdown spectroscopy (LIBS)

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Title: The determination of V and Mo by dispersive liquid–liquid microextraction (DLLME) combined with laser-induced breakdown spectroscopy (LIBS)
Authors: Jesus, Amanda M. D. de | Aguirre Pastor, Miguel Ángel | Hidalgo, Montserrat | Canals, Antonio | Pereira-Filho, Edenir R.
Research Group/s: Espectroscopía Atómica-Masas y Química Analítica en Condiciones Extremas
Center, Department or Service: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Laser-induced breakdown spectroscopy (LIBS) | Dispersive liquid–liquid microextraction (DLLME)
Knowledge Area: Química Analítica
Issue Date: 25-Jun-2014
Publisher: Royal Society of Chemistry
Citation: Journal of Analytical Atomic Spectrometry. 2014, 29: 1813-1818. doi:10.1039/C4JA00151F
Abstract: Laser-induced breakdown spectroscopy (LIBS) is a promising analytical technique with well-known advantages and limitations. However, despite its growing popularity, this technique has been applied mainly to solid samples and there have been a smaller number of studies devoted to liquid samples. This lack of studies is mainly due to experimental difficulties in the analysis of liquid matrices. Sensitivity can be improved and matrix effects minimized in the LIBS analysis of aqueous samples by using a dispersive liquid–liquid microextraction (DLLME) procedure followed by drying the extract on a suitable surface prior to laser irradiation. The combination of DLLME-LIBS is fast, easy to use, and inexpensive. The small volume of the final extract is sufficient for LIBS analysis, and the procedure generates little waste. It is likely that this combination could be automated during future work. The limits of detection (LOD) and quantification (LOQ) achieved using the proposed method were 30 and 70 μg L−1 for Mo and 5 and 20 μg L−1 for V, respectively. Using this method, we analyzed samples of pharmaceutical, multimineral formulation, soil, mineral water and a reference material NCS ZC 85005 (Beef Liver). In the latter, the concentration of V was below the LOQ, and the recovery of Mo was 103%.
Sponsor: The authors are grateful to Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES-DGU and grants 243/11 and 1267/01-2), the Spanish Government (Projects CTQ2011-23968 and PHB2010-0018-PC), the Regional Government of Valencia (Spain) (ACOMP/2013/072), Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq (grants 304772/2012-7 and 474357/2012-0) and Grants 2012/01769-3 and 2012/50827-6, São Paulo Research Foundation (FAPESP), for the financial support.
ISSN: 0267-9477 (Print) | 1364-5544 (Online)
DOI: 10.1039/C4JA00151F
Language: eng
Type: info:eu-repo/semantics/article
Rights: This article is licensed under a Creative Commons Attribution 3.0 Unported Licence
Peer Review: si
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