Abstract
The addition of organic solvents (heavy aliphatic, light aliphatic and aromatic hydrocarbons) in Brazilian gasoline is unfortunately very frequent, and this illicit practice does not guarantee gasoline quality. Organic solvent adulterations of gasoline samples have been investigated. For characterization and comparison of these samples, physico-chemical parameters were selected as the factor for hierarchic multivariate analysis (Cluster Analysis). However, these parameters are not efficient to detected all kinds of adulteration. Gas Chromatographic (GC) analysis can be used as a procedure to improve the detection of adulterated gasoline. More detailed information of their compositions was revealed. The use of physico-chemical properties of gasoline samples for hierarchic multivariate analysis and gas chromatographic fingerprints is a practicable method to adulteration detection.
Highlights
The Brazilian fuel market has gone through great changes in last years with the end of state production.[1]
With the end of the distribution monopoly and the state production, which lead to an increase number of fuel deals, and fuel gas station, the opening of the market, a stronger competition with ensuing great price variation
Cluster Analysis result was obtained with the selected physico-chemical data from the 22 intentionally adulterated gasoline and 22 gas station samples
Summary
The Brazilian fuel market has gone through great changes in last years with the end of state production.[1]. The most important solvents used for adulterating gasoline are: light aliphatic hydrocarbons (C4-C8), heavy aliphatic hydrocarbons (C13-C15) and aromatic hydrocarbons. Gas chromatography has been used to compare liquid petroleum products within a given classification.[18] Our group has published previous chromatographic data on gasoline samples.[19, 20]
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