A chemically modified microelectrode has been developed for the determination of amine antioxidants in turbine lubricants. The electrochemical probe is coated with a thin film of conducting poly(ethylene oxide), which, when placed into a lubricant environment, results in the extraction of the electroactive species into the polymer. Cyclic voltammetric experiments have been performed and an ability to measure the phenyl-α-napthylamine additive quantitatively has been demonstrated.
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Price et al. (1991) studied this question.
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