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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.)

Application of Laser-Induced Breakdown Spectroscopy and Hyperspectral Images for Direct Evaluation of Chemical Elemental Profiles of Coprolites

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Author(s):
Speranca, Marco Aurelio ; Batista de Aquino, Francisco Wendel ; Fernandes, Marcelo Adorna ; Lopez-Castillo, Alejandro ; Carneiro, Renato Lajarim ; Pereira-Filho, Edenir Rodrigues
Total Authors: 6
Document type: Journal article
Source: GEOSTANDARDS AND GEOANALYTICAL RESEARCH; v. 41, n. 2, p. 273-282, JUN 2017.
Web of Science Citations: 6
Abstract

This study demonstrates the application of laser-induced breakdown spectroscopy (LIBS) and hyperspectral imaging to the investigation of coprolite and fossil samples. Solid samples from the Permian (seven coprolites and one fossil), Cretaceous (one coprolite) and Oligo-Miocene (two coprolites) periods were directly analysed, and emission spectra from 186 to 1042nm were obtained in several areas covering coprolite/fossil and rock material. Initial exploratory analyses were performed using principal component analysis with the data set normalised by the norm (Euclidean norm = 1). After identification and selection of emission lines of eleven elements (Al, Ca, Cr, Fe, K, Mg, Mn, Na, Ni, P and Si), the signals were normalised again by the relative intensity of the selected element. Phosphorus was identified mainly in the coprolites, while K and Na were primarily found in the rock material. In several cases, there was a positive correlation between Ca and P. A sample from the Oligo-Miocene series was also analysed using inductively coupled plasma-optical emission spectrometry (ICP-OES) (rock and coprolites were analysed separately). Based on the quantitative results from ICP-OES, it was confirmed that the tendency was the same as that observed with the results obtained from LIBS directly in the solid sample. (AU)

FAPESP's process: 12/01769-3 - Development of spectroanalytical methods for direct analysis of waste electrical and electronic equipments and cosmetics
Grantee:Edenir Rodrigues Pereira Filho
Support type: Regular Research Grants
FAPESP's process: 13/04688-7 - Development of spectroanalytical methods for direct determination of toxic elements in polymeric materials of electronic waste by Laser-Induced Breakdown Spectroscopy
Grantee:Francisco Wendel Batista de Aquino
Support type: Scholarships in Brazil - Post-Doctorate