Journal
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
Volume 64, Issue 5, Pages 369-377Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2009.04.003
Keywords
LIBS; Plant material; Micronutrients; Laser-induced breakdown spectrometry
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Funding
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [04/15965-2, 06/06466-8, 05/50773-0]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [477385/2006-0, 301285/2006-3]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [04/15965-2] Funding Source: FAPESP
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Laser induced breakdown spectroscopy (LIBS) has been evaluated for the determination of micronutrients (B, Cu, Fe, Mn and Zn) in pellets of plant materials, using NIST, BCR and GBW biological certified reference materials for analytical calibration. Pellets of approximately 2 mm thick and 15 mm diameter were prepared by transferring 0.5 g of powdered material to a 15 mm die set and applying 8.0 tons cm(-2). An experimental setup was designed by using a Nd:YAG laser operating at 1064 nm (200 mJ per pulse, 10 Hz) and an Echelle spectrometer with ICCD detector. Repeatability precision varied from 4 to 30% from measurements obtained in 10 different positions (8 laser shots per test portion) in the same sample pellet. Limits of detection were appropriate for routine analysis of plant materials and were 2.2 mg kg(-1) B, 3.0 mg kg(-1) Cu, 3.6 mg kg(-1) Fe, 1.8 mg kg(-1) Mn and 1.2 mg kg(-1) Zn. Analysis of different plant samples were carried out by LIBS and results were compared with those obtained by ICP OES after wet acid decomposition. (C) 2009 Elsevier B.V. All rights reserved.
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