Evaluation of laser induced breakdown spectroscopy for cadmium determination in soils

Evaluation of laser induced breakdown spectroscopy for cadmium determination in soils

Author Santos, Dario Autor UNIFESP Google Scholar
Nunes, Lidiane C. Google Scholar
Trevizan, Lilian C. Google Scholar
Godoi, Quienly Google Scholar
Leme, Flavio O. Google Scholar
Braga, Jez Willian B. Google Scholar
Krug, Francisco Jose Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Universidade Federal de São Carlos (UFSCar)
Universidade de Brasília (UnB)
Abstract Cadmium is known to be a toxic agent that accumulates in the living organisms and present high toxicity potential over lifetime. Efforts towards the development of methods for microanalysis of environmental samples, including the determination of this element by graphite furnace atomic absorption spectrometry (GFAAS). inductively coupled plasma optical emission spectrometry (ICP OES), and inductively coupled plasma-mass spectrometry (ICP-MS) techniques, have been increasing. Laser induced breakdown spectroscopy (UBS) is an emerging technique dedicated to microanalysis and there is a lack of information dealing with the determination of cadmium. the aim of this work is to demonstrate the feasibility of LIBS for cadmium detection in soils. the experimental setup was designed using a laser Q-switched (Nd:YAG, 10 Hz, lambda = 1064 nm) and the emission signals were collimated by lenses into an optical fiber Coupled to a high-resolution intensified charge-coupled device (ICCD)-echelle spectrometer. Samples were cryogenically ground and thereafter pelletized before LIBS analysis. Best results were achieved by exploring a test portion (i.e. sampling spots) with larger surface area, which contributes to diminish the uncertainty due to element specific microheterogeneity. Calibration curves for cadmium determination were achieved using certified reference materials. the metrological figures of merit indicate that LIBS can be recommended for screening of cadmium contamination in soils. (C) 2009 Elsevier B.V. All rights reserved.
Keywords Laser induced breakdown spectroscopy
Language English
Date 2009-10-01
Published in Spectrochimica Acta Part B-atomic Spectroscopy. Oxford: Pergamon-Elsevier B.V., v. 64, n. 10, p. 1073-1078, 2009.
ISSN 0584-8547 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 1073-1078
Origin http://dx.doi.org/10.1016/j.sab.2009.07.030
Access rights Closed access
Type Article
Web of Science ID WOS:000271546700019
URI http://repositorio.unifesp.br/handle/11600/31867

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