Electrocatalytic Oxidation of Hydroquinone atPoly(crystal-violet) Film—Modified Electrodeand Its Selective Determination in the Presence ofo-Hydroquinone and m-Hydroquinone

摘要

A stable poly(crystal-violet) (PCV) electroactive film was electro-deposited on a glassy carbon electrode (GCE). The redoxation of hydroquinoneshowed a pair of well-defined peaks on a PCV electrode with a potential differ-ence of 30 mV, which is 120 mV less than that obtained on the GCE. At optimalconditions, the PCV electrode linearly responded to the hydroquinone in therange of 4 × 10~(-6)mol L~(-1)to 3.2 × 10~(-3)mol and a detection limit of8 × 10~(-8)mol L~(-1)was obtained. The separations of the oxidation peak