Highly non-polar/non-conducting media such as natural or synthetic oils cannot be analysed by conventional single phase solution voltammetry, but it is shown here that, when they are deposited onto suitable basal plane pyrolytic graphite electrode surfaces, the triple phase boundary reaction zone in liquid | liquid two-phase systems in contact to a graphite electrode can be exploited for the electrochemical determination of the content and activity of anti-oxidants such as Irganox L-135 and L-57 in fuel (methyl-laurate) and in oil (commercially available API Group III base oil) media.
Xiaohang Zhang, Frank Marken*, Christopher A. Paddon
Department of Chemistry, University of Bath, Claverton Down, BA2 7AY, UK, Lubricants Technology, Shell Global Solutions (UK), Shell Technology Centre Thornton, P.O. Box 1, Chester CH1 3SH, UK
9th International Conference on Engines and Vehicles