Elemental analysis by surface-enhanced Laser-Induced Breakdown Spectroscopy combined with liquid–liquid microextraction

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Title: Elemental analysis by surface-enhanced Laser-Induced Breakdown Spectroscopy combined with liquid–liquid microextraction
Authors: Aguirre Pastor, Miguel Ángel | Legnaioli, Stefano | Almodóvar, F. | Hidalgo, Montserrat | Palleschi, Vincenzo | Canals, Antonio
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
Keywords: LIBS analysis | Liquid micro-sample | Surface-enhanced LIBS
Knowledge Area: Química Analítica
Issue Date: 2013
Publisher: Elsevier
Citation: Spectrochimica Acta Part B: Atomic Spectroscopy. 2013, 79-80: 88-93. doi:10.1016/j.sab.2012.11.011
Abstract: In this work, the possibility of using Laser-Induced Breakdown Spectrometry (LIBS) combined with liquid–liquid microextraction techniques is evaluated as a simple and fast method for trace elemental analysis. Two different strategies for LIBS analysis of manganese contained in microdroplets of extraction solvent (Triton X-114) are studied: (i) analysis by direct laser irradiation of microdroplets; and (ii) analysis by laser irradiation of microdroplets dried on metallic substrates (surface-enhanced LIBS — SENLIBS). Experiments were carried out using synthetic samples with different concentrations of manganese in a 10% w/w Triton X-114 matrix. The analysis by direct laser irradiation of microdroplets showed low precision, sensitivity and poor linearity across the concentration range evaluated (R2 < 0.95). On the other hand, the SENLIBS method of analysis improved the sensitivity, the precision and the linearity of the calibration curve with respect to the direct analysis of microdroplets. In comparison with experimental results obtained by direct analysis, SENLIBS also allowed several replicate measurements to be carried out in a single microdroplet. The limit of detection obtained was 6 μg g− 1 of Mn.
Sponsor: This research has been supported by the Spanish Government (project no. CTQ2008-06730-C02-01), the regional Government of Valencia (project nos. ACOMP/2009/144 and COMP/2010/047) and the University of Alicante (project no. INV09-39).
URI: http://hdl.handle.net/10045/38401
ISSN: 0584-8547 (Print) | 1873-3565 (Online)
DOI: 10.1016/j.sab.2012.11.011
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.sab.2012.11.011
Appears in Collections:INV - SP-BG - Artículos de Revistas

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