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Title: Evaluation of laser induced breakdown spectroscopy for the determination of macronutrients in plant materials
Authors: Trevizan, Lilian Cristina
Santos, Dario [UNIFESP]
Samad, Ricardo Elgul
Vieira, Nilson Dias
Nomura, Cassiana Seimi
Nunes, Lidiane Cristina
Rufini, Iolanda Aparecida
Krug, Francisco Jose
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Universidade Federal do ABC (UFABC)
Universidade Federal de São Carlos (UFSCar)
Keywords: LIBS
Plant analysis
Issue Date: 1-Oct-2008
Publisher: Elsevier B.V.
Citation: Spectrochimica Acta Part B-atomic Spectroscopy. Oxford: Pergamon-Elsevier B.V., v. 63, n. 10, p. 1151-1158, 2008.
Abstract: Laser induced breakdown spectroscopy (LIBS) has become an analytical tool for the direct analysis of a large variety of materials in order to provide qualitative and/or quantitative information. However, there is a lack of information for LIBS analysis of agricultural and environmental samples. in this work a LIBS system has been evaluated for the determination of macronutrients (P, K, Ca, Mg) in pellets of vegetal reference materials. An experimental setup was designed by using a Nd:YAG laser operating at 1064 nm and an Echelle spectrometer with ICCD detector. the plasma temperature was estimated by Boltzmann plots and instrumental paragmeters such as delay time, lens-to-sample distance and pulse energy were evaluated. Certified reference materials as well as reference materials were used for analytical calibrations of P, K, Ca, and Mg. Most results of the direct analysis of plant samples by LIBS were in reasonable agreement with those obtained by ICP OES after wet acid decomposition. (C) 2008 Elsevier B.V. All rights reserved.
ISSN: 0584-8547
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Appears in Collections:Em verificação - Geral

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