Determination of 2,6-di-tert.-butyl-4-methylphenol in aviation turbine fuel by liquid chromatograpy with electrochemical detection

✍ Scribed by G.E. Hayes; D.E. Hillman

• Book ID: 104146637
• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 220 KB
• Volume: 322
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(01)97699-x

✦ Synopsis

2,6-Di-tert.-butyl-4-methylphenol

(2,6B4M), is one of a number of phenolic antioxidants, which are approved for service use in aviation turbine fuel (AVTUR). The specified level for total active material in hydrogen-treated fuel is between 17 and 24 mg/l, and for non-hydrogen-treated fuel the level of total active material should not exceed 24.0 mg/l. 2,6B4M may be present as the sole antioxidant, or as a component of a mixture.

Liquid chromatography with UV detection has been used to measure low levels of the related anti-oxidant, 2,4-dimethyl-6-tert.-butylphenol

(2,4M6B) in aviation turbine fue11s2. However, previous attempts to determine 2,6B4M by normal or reversed-phase chromatography have failed, owing to the highly hindered structure of this compound, which causes it to elute with the hydrocarbon components of the AVTUR.

Selective detection, by electrochemical means, was also attempted and showed initial promise but failed at the 10-30 ppm level, owing to instability caused by the large excess of fuel components. This report describes the successful use of a more sophisticated dual-electrode detector, used in the oxidative screen mode. EXPERIMENTAL