Potential use of the characteristic Raman lines of toluene (C7H8 ) as a reference on the spectral analysis of fuel blends

Valentin Ortega Clavero; Andreas Weber; Werner Schröder; Dan Curticapean

doi:10.1117/12.2185100

22 June 2015 Potential use of the characteristic Raman lines of toluene (C₇H₈ ) as a reference on the spectral analysis of fuel blends

Valentin Ortega Clavero, Andreas Weber, Werner Schröder, Dan Curticapean

Author Affiliations +

Proceedings Volume 9525, Optical Measurement Systems for Industrial Inspection IX; 95254G (2015) https://doi.org/10.1117/12.2185100
Event: SPIE Optical Metrology, 2015, Munich, Germany

Abstract

We report the use of the Raman spectral information of the chemical compound toluene C₇H₈ as a reference on the analysis of laboratory-prepared and commercially acquired gasoline-ethanol blends. The rate behavior of the characteristic Raman lines of toluene and gasoline has enabled the approximated quantification of this additive in commercial gasoline-ethanol mixtures. This rate behavior has been obtained from the Raman spectra of gasoline-ethanol blends with different proportions of toluene.

All these Raman spectra have been collected by using a self-designed, frequency precise and low-cost Fourier-transform Raman spectrometer (FT-Raman spectrometer) prototype. This FT-Raman prototype has helped to accurately confirm the frequency position of the main characteristic Raman lines of toluene present on the different gasoline-ethanol samples analyzed at smaller proportions than those commonly found in commercial gasoline-ethanol blends. The frequency accuracy validation has been performed by analyzing the same set of toluene samples with two additional state-of-the-art commercial FT-Raman devices. Additionally, the spectral information has been contrasted, with highly-correlated coefficients as a result, with the values of the standard Raman spectrum of toluene.

Citation Download Citation

Valentin Ortega Clavero, Andreas Weber, Werner Schröder, and Dan Curticapean "Potential use of the characteristic Raman lines of toluene (C₇H₈ ) as a reference on the spectral analysis of fuel blends", Proc. SPIE 9525, Optical Measurement Systems for Industrial Inspection IX, 95254G (22 June 2015); https://doi.org/10.1117/12.2185100

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