Journal
TALANTA
Volume 77, Issue 1, Pages 256-261Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2008.06.021
Keywords
Laser-induced breakdown spectroscopy (LIBS); LIBS in liquids; Lanthanides; Samarium; Europium; Gadolinium; Filter paper
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This paper reports studies on the determination of trace levels of samarium, europium and gadolinium in aqueous samples by laser-induced breakdown spectroscopy (LIBS). In this work, a membrane-based filter paper was used as a sample support for the liquid samples. The laser-induced plasma was produced in air at atmospheric pressure, using a pulsed Nd:YAG laser. Calibration standards and synthetic mixtures of these lanthanides were prepared using solutions prepared from respective high purity oxides. Linear calibration was obtained for Sm, Eu and Gd by normalizing the intensities of lanthanides emission lines with respective to C(1) 193.029 nm emission line. The concentrations of Sm, Eu and Gd were then determined in a solution containing a mixture of these lanthanides. The concentrations of individual lanthanides were obtained within 5% of the expected values. Limits of detection were found to be 1.3 ppmw (Sm),1.9 ppmw (Eu) and 2.3 ppmw (Gd). (c) 2008 Elsevier B.V. All rights reserved.
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