Evaluation of laser induced breakdown spectroscopy for the determination of micronutrients in plant materials

Author(s)

Trevizan, Lilian Cristina ^[1] ; Santos, Jr., Dario ^[2] ; Samad, Ricardo Elgul ^[3] ; Vieira, Jr., Nilson Dias ^[3] ; Nunes, Lidiane Cristina ^{[4, 1]} ; Rufini, Iolanda Aparecida ^[1] ; Krug, Francisco Jose ^[1]

Affiliation

^[1] Univ Sao Paulo, Ctr Energia Nucl Agr, BR-13416000 Piracicaba, SP - Brazil

^[2] Univ Fed Sao Paulo, BR-09972270 Diadema, SP - Brazil

^[3] CNEN SP, IPEN, Ctr Lasers & Aplicacoes, BR-05508000 Sao Paulo - Brazil

^[4] Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY; v. 64, n. 5, p. 369-377, MAY 2009.
• Web of Science Citations: 85

Abstract

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. (AU)

• FAPESP's process: 04/15965-2 - Implementation and development of Laser Induced Breakdown Spectroscopy (LIBS)
• Grantee: Francisco José Krug
• Support Opportunities: Research Projects - Thematic Grants