Evaluation of micro-energy dispersive X-ray fluorescence spectrometry for the analysis of plant materials

Evaluation of micro-energy dispersive X-ray fluorescence spectrometry for the analysis of plant materials

Author Bueno Guerra, Marcelo Braga Google Scholar
Schaefer, Carlos E. G. R. Google Scholar
Carvalho, Gabriel G. A. de Google Scholar
Souza, Paulino F. de Google Scholar
Santos Junior, Dario Autor UNIFESP Google Scholar
Nunes, Lidiane C. Google Scholar
Krug, Francisco J. Google Scholar
Institution Universidade de São Paulo (USP)
Universidade Federal de Viçosa (UFV)
Ctr Tecnol Canavieira
Universidade Federal de São Paulo (UNIFESP)
Abstract An analytical procedure relying on micro-energy dispersive X-ray fluorescence spectrometry (mu-EDX) was evaluated for the quantitative determination of macro-, micronutrients and beneficial elements in pressed pellets of plant materials. for testing purposes, leaves from 23 varieties of sugar cane, previously analyzed by validated reference methods, based on wet decomposition procedures followed by ICP OES measurements were used. Linear correlations between analyte mass fractions in the tested samples and the corresponding mu-EDX intensities were obtained for P, K, Ca, S, Fe, Mn and Si with regression coefficients ranging from 0.9501 to 0.9933. Furthermore, the coefficients of variation of results in the 0.3 to 16% range (n = 3 sampling lines, 30 sampling sites per line), the spatial resolution of 50 mu m per site and the suitable detection limits for these analytes were additional features that demonstrated the performance of the proposed procedure as a useful tool for plant nutrient diagnosis. in addition, the results also indicate that mu-EDX can be recommended as a cross-validation method for analysis of plant materials, owing to its inherent non-destructive capability and, particularly, when dealing with analytes' micro-heterogeneity evaluation within the samples.
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
Grant number FAPESP: 2010/16379-0
FAPESP: 2010/17158-8
FAPESP: 2012/16203-5
CNPq: 578728/2008-7
CNPq: 140926/2009-7
CNPq: 305913/2009-3
CNPq: 309800/2011-0
CNPq: 482500/2011-5
CNPq: 382189/2012-4
FAPEMIG: 12070/2009
Date 2013-01-01
Published in Journal of Analytical Atomic Spectrometry. Cambridge: Royal Soc Chemistry, v. 28, n. 7, p. 1096-1101, 2013.
ISSN 0267-9477 (Sherpa/Romeo, impact factor)
Publisher Royal Soc Chemistry
Extent 1096-1101
Origin http://dx.doi.org/10.1039/c3ja50084e
Access rights Closed access
Type Article
Web of Science ID WOS:000320270000016
URI http://repositorio.unifesp.br/handle/11600/35821

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