Determination of sulfur in diesel using ATR/FTIR and multivariate calibration

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Published: Jun 28, 2010
DOI: https://doi.org/10.26850/1678-4618eqj.v35.2.2010.p71-78
Keywords:
PLS, sulfur, ATR/FTIR

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Itânia Pinheiro Soares
Universidade Federal de Minas Gerais, Instituto de Ciências Exatas, Belo Horizonte, Brasil.
Thaís Fonseca Rezende
Universidade Federal de Minas Gerais, Instituto de Ciências Exatas, Belo Horizonte, Brasil.
Isabel Cristina Pereira Fortes
Universidade Federal de Minas Gerais, Instituto de Ciências Exatas, Belo Horizonte, Brasil.
https://orcid.org/0000-0002-7440-2403

Abstract

The aim of this present work was to provide a more fast, simple and less expensive to analyze sulfur content in diesel samples than by the standard methods currently used. Thus, samples of diesel fuel with sulfur concentrations varying from 400 and 2500 mgkg-1 were analyzed by two methodologies: X-ray fluorescence, according to ASTM D4294 and by Fourier transform infrared spectrometry (FTIR). The spectral data obtained from FTIR were used to build multivariate calibration models by partial least squares (PLS). Four models were built in three different ways: 1) a model using the full spectra (665 to 4000 cm-1), 2) two models using some specific spectrum regions and 3) a model with variable selected by classic method of variable selection stepwise. The model obtained by variable selection stepwise and the model built with region spectra between 665 and 856 cm-1 and 1145 and 2717 cm-1 showed better results in the determination of sulfur content.

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How to Cite
Soares, I. P., Rezende, T. F., & Fortes, I. C. P. (2010). Determination of sulfur in diesel using ATR/FTIR and multivariate calibration. Eclética Química, 35(2), 71–78. https://doi.org/10.26850/1678-4618eqj.v35.2.2010.p71-78
Issue
Vol. 35 No. 2 (2010): Eclética Química
Section
Original articles
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