Octane number is a measure of the knock resistance of gasoline. The higher the octane number, the lower knock resistance. Therefore, the gasoline with high octane number is marketed as a premium gasoline. Generally, 8-15% of fuel additives in the form of alcohol or ether are added to gasoline to increase the octane number.

Not like other additives such as olefins that can generate toxic pollutant like formaldehyde and acetaldehyde, oxygenates help pollutant like formaldehyde and acetaldehyde, oxygenates help fuel to burn more efficiently and reduce emission of air pollutants.

Generally, alcohols and ethers such as methyl tert-butylether (MTBE), ethyl tert-butylether (ETBE) and ethanol are used for oxygenates. Among those oxygenates, most commonly used methyl tert-butylether (MTBE) produces nitrogen oxides and aldehydes causing air pollution, it is required to be regulated.

The analysis of oxygenates in gasoline by ChroZen GC guarantees great repeatability and linearity by satisfying the specification of ASTM D4815.

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