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

Comparison of Fused Glass Beads and Pressed Powder Pellets for the Quantitative Measurement of Al, Fe, Si and Ti in Bauxite by Laser-Induced Breakdown Spectroscopy

Full text
Carvalho, Alexandrina A. C. [1] ; Alves, Victoria C. [1] ; Silvestre, Daniel M. [1] ; Leme, Flavio O. [2] ; Oliveira, Pedro V. [1] ; Nomura, Cassiana S. [1]
Total Authors: 6
[1] Univ Sao Paulo, Dept Quim Fundamental, Inst Quim, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Av Estados 5001, Santo Andre, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: GEOSTANDARDS AND GEOANALYTICAL RESEARCH; v. 41, n. 4, p. 585-592, DEC 2017.
Web of Science Citations: 3

Due to matrix interference and sample particle size effects, some of the most important and difficult issues in laser-induced breakdown spectroscopy (LIBS) analysis are the calibration and quantitative measurement of a complex matrix. This study proposes the use of borate fusion as an alternative sample preparation procedure for the quantitative measurement of Al, Fe, Si and Ti in bauxite by LIBS. Analytical calibration curves were made using bauxite certified reference materials (CRM), and the precision and accuracy of the methods were evaluated by analysing an additional bauxite CRM, using two different approaches: pressed powder pellets and fused glass beads. The borate fusion method was the most suitable sample preparation technique, since particle size effects and matrix interference could be minimised, obtaining better linearity on the analytical calibration curves (r(2)), and more accurate and more precise results for bauxite analysis. (AU)

FAPESP's process: 12/11998-0 - Evaluation and production of synthetic calibrating material for direct analysis of wood by LIBS
Grantee:Cassiana Seimi Nomura
Support type: Regular Research Grants
FAPESP's process: 13/13478-6 - Evaluation of the effect of laser and sample properties in the direct analysis of meats by Laser Induced Breakdown Spectroscopy (LIBS)
Grantee:Flavio de Oliveira Leme
Support type: Scholarships in Brazil - Post-Doctorate