Determination of Oxygenates in Gasoline

Kuwait University

Oxygenated compounds can be present in various hydrocarbon matrices either because they were purposely added (e.g. gasoline) or because they are naturally present or formed during catalytic processes (e.g. polymer production). In gasoline, oxygenated compounds are added as ‘anti-knock’ agents to increase the octane number and decrease emissions by replacing organo-lead compounds. The type and concentration of oxygenated compounds must be measured in reformulated gasolines as part of ongoing product quality assessment, and to confirm the oxygenated components have been added in the correct amounts according to regulatory requirements. ASTM D4815 is frequently chosen as the standard method for the determination of oxygenated compounds.


  • The system contains a specially designed column, which only passes the ethers and alcohols to the detector, while all other components are vented out.
  • The following ethers and alcohols can be detected and quantified using the system:
  1. Methyl tert-butylether (MTBE),
  2. Diisopropylether (DIPE),
  3. Ethyl tert-butylether (ETBE),
  4. tert-Amylmethylether (TAME),
  5. C1 to C4 Alcohols
  6. tert-amyl alcohol.

Manufacturer and Mode No.
Manufacturer:Varian, Inc. (part of Agilant Technologies).
Model No.: GASOHOL Analyzer Varian 450 GC.



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Contact: Ext. 3621