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Development of a laser-induced breakdown spectrometer and evaluation of alternative detection systems

Grant number: 05/04456-2
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): April 01, 2006
Effective date (End): September 30, 2008
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal Investigator:Celio Pasquini
Grantee:Fabiano Barbieri Gonzaga
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


Laser induced breakdown spectroscopy (LIBS), a relatively recent analytical technique in relation to other atomic spectrometric techniques more used and developed, is based on the incidence of a laser radiation over a small region of the sample promoting its ablation, plasma formation and light emission characteristic of sample constituents. Due to its various advantages over other atomic spectrometric techniques, as direct analysis of practically any sample, practically non-destructive and micro-region analysis, LIBS has been subject of various international research projects seeking the development, still incipient, of this technique. This project proposes the construction of a LIBS instrument using three detection systems: one employing advanced technology, based on an Echelle type monocromator and a bidimensional array of intensified charge coupled device (ICCD) type detectors; and two low cost alternative detection systems, the first based on an acouto optical tunable filter (AOTF) and a photomultiplier and the second based on a low resolution diffraction grating and a linear array of photodiodes. The alternative detection systems will be evaluated by using the LIBS instrument to develop quantitative methods for determination of interest elements in metal alloy samples, eventually using multivariate calibration to compensate possible losses of spectral resolution. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GONZAGA, FABIANO BARBIERI; PASQUINI, CELIO. A low cost short wave near infrared spectrophotometer: Application for determination of quality parameters of diesel fuel. Analytica Chimica Acta, v. 670, n. 1-2, p. 92-97, JUN 18 2010. Web of Science Citations: 22.

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