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dc.contributor.authorArantes de Carvalho, Gabriel Gustinelli
dc.contributor.authorSantos Junior, Dario [UNIFESP]
dc.contributor.authorNunes, Lidiane Cristina
dc.contributor.authorGomes, Marcos da Silva
dc.contributor.authorLeme, Flavio de Oliveira
dc.contributor.authorKrug, Francisco Jose
dc.identifier.citationSpectrochimica Acta Part B-atomic Spectroscopy. Oxford: Pergamon-Elsevier B.V., v. 74-75, p. 162-168, 2012.
dc.description.abstractThe effects of laser focusing and fluence on LIBS analysis of pellets of plant leaves was evaluated. A Q-switched Nd:YAG laser (5ns, 10Hz, 1064nm) was used and the emission signals were collected by lenses into an optical fiber coupled to a spectrometer with Echelle optics and ICCD. Data were acquired from the accumulation of 20 laser pulses at 2.0 mu s delay and 5.0 mu s integration time gate. the emission signal intensities increased with both laser fluence and spot size. Higher sensitivities for Ca, K, Mg, P, Al, B, Cu, Fe, Mn, and Zn determinations were observed for fluences in the range from 25 to 60Jcm(-2). Coefficients of variation of site-to-site measurements were generally lower than 10% (n=30 sites, 20 laser pulses/site) for a fluence of 50Jcm(-2) and 750 mu m spot size. for most elements, there is an indication that accuracy is improved with higher fluences. (C) 2012 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.publisherElsevier B.V.
dc.relation.ispartofSpectrochimica Acta Part B-atomic Spectroscopy
dc.rightsAcesso restrito
dc.subjectLaser-induced breakdown spectroscopyen
dc.subjectPlant materialen
dc.subjectLaser focusingen
dc.titleEffects of laser focusing and fluence on the analysis of pellets of plant materials by laser-induced breakdown spectroscopyen
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.description.affiliationUniv São Paulo, Ctr Energia Nucl Agr, BR-13416000 Piracicaba, SP, Brazil
dc.description.affiliationUniversidade Federal de São Paulo UNIFESP, BR-09972270 Diadema, SP, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo UNIFESP, BR-09972270 Diadema, SP, Brazil
dc.description.sponsorshipIDFAPESP: FAPESP 04/15965-2
dc.description.sponsorshipIDFAPESP: 2010/16379-0
dc.description.sponsorshipIDFAPESP: 2010/17158-8
dc.description.sponsorshipIDCNPq: CNPq 140879/2008-0
dc.description.sponsorshipIDCNPq: 140926/2009-7
dc.description.sponsorshipIDCNPq: 305913/2009-3
dc.description.sponsorshipIDCNPq: 578728/2008-7
dc.description.sponsorshipIDCNPq: 309800/2011-0
dc.description.sourceWeb of Science

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