Determination of Gasoline Adulteration by Principal Components Analysis-Linear Discriminant Analysis Applied to FTIR Spectra

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• 作者：Rita C. C. Pereira ; Vinicius L. Skrobot ; Eustá ; quio V. R. Castro ; Isabel C. P. Fortes ; and Vâ ; nya M. D. Pasa
• 刊名：Energy & Fuels
• 出版年：2006
• 出版时间：May 2006
• 年：2006
• 卷：20
• 期：3
• 页码：1097 - 1102
• 全文大小：132K
• 年卷期：v.20,no.3(May 2006)
• ISSN：1520-5029

文摘

Brazilian automotive gasoline has been the target of constant adulterations in an attempt to raise profitmargins as a result of the market flexibility and the ensuing increased competition. Gasoline adulteration withsolvents is common because solvents present lower taxation in comparison to gasoline. In the face of this, theimportance of developing low-cost analytical techniques such as spectroscopy to certify the quality andauthenticity of fuels used in Brazil is conspicuous. This work used IR spectroscopy and multivariate techniques(principal components analysis-linear discriminant analysis, PCA-LDA) to determine gasoline adulteration bysolvent and to identify the solvent added. The results show that FTIR associated with PCA-LDA is a powerfultechnique in the quality control of automotive gasoline. The method sensitivity was 8% v/v with 96% efficiencyin the classification of adulterated and unadulterated gasoline and 93% efficiency in the identification of thetype of solvent added.