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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of inorganic nutrients in wheat flour by laser-induced breakdown spectroscopy and energy dispersive X-ray fluorescence spectrometry

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Author(s):
Peruchi, Lidiane Cristina [1] ; Nunes, Lidiane Cristina [1] ; Arantes de Carvalho, Gabriel Gustinelli [1] ; Bueno Guerra, Marcelo Braga [1] ; de Almeida, Eduardo [1] ; Rufini, Iolanda Aparecida [1] ; Santos, Jr., Dario [2] ; Krug, Francisco Jose [1]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Ctr Nucl Energy Agr, NAPTISA Res Support Ctr Technol & Innovat Sustain, BR-13416000 Piracicaba, SP - Brazil
[2] Univ Fed Sao Paulo, BR-09972270 Diadema, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY; v. 100, p. 129-136, OCT 1 2014.
Web of Science Citations: 28
Abstract

Laser-induced breakdown spectroscopy (LIBS) and energy dispersive X-ray fluorescence spectrometry (EDXRF) were evaluated for the determination of P, K, Ca, Mg, S, Fe, Cu, Mn and Zn in pressed pellets of wheat flours. EDXRF and LIBS calibration models were built with analytes mass fractions determined by inductively coupled plasma optical emission spectrometry after microwave-assisted acid digestion in a set of 25 wheat flour laboratory samples. Test samples consisted of pressed pellets prepared from wheat flour mixed with 30% mm-1 cellulose binder. Experiments were carried out with a LIBS setup consisted of a Q-switched Nd:YAG laser and a spectrometer with Echelle optics and ICCD, and a benchtop EDXRF system fitted with a Rh target X-ray tube and a Si(Li) semiconductor detector. The correlation coefficients from the linear calibration models of P, K, Ca, Mg, S, Fe, Mn and Zn determined by LIBS and/or EDXRF varied from 0.9705 for Zn to 0.9990 for Mg by LIBS, and from 0.9306 for S to 0.9974 for K by EDXRF. The coefficients of variation of measurements varied from 1.2 to 20% for LIBS, and from 03 to 24% for EDXRF. The predictive capabilities based on RMSEP (root mean square error of prediction) values were appropriate for the determination of P, Ca, Mg, Fe, Mn and Zn by LIBS, and for P, K, S, Ca, Fe, and Zn by EDXRF. In general, results from the analysis of NIST SRM 1567a Wheat flour by LIBS and EDXRF were in agreement with their certified mass fractions. (C) 2014 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 10/16379-0 - Sampling strategies for analysis of biological materials by laser induced breakdown spectrometry
Grantee:Gabriel Gustinelli Arantes de Carvalho
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 10/17158-8 - Evaluation of laser induced breakdown spectrometry (LIBS) for determination of inorganic contaminants in agricultural fertilizers
Grantee:Lidiane Cristina Nunes
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 12/16203-5 - Strategies for the direct analysis of sugar cane leaves by laser induced breakdown spectroscopy(LIBS)
Grantee:Marcelo Braga Bueno Guerra
Support Opportunities: Scholarships in Brazil - Post-Doctoral