The electrochemical properties of p-aminophenol(PAP) on the acetylferrocene modified carbon paste electrode were characterized by linear sweep stripping voltammetry.The results showed that PAP was catalyzed on the modified electrode in phosphate buffer saline(pH 3.2).The calibration curve for PAP concentration was in the range from 7.0×10-7 to 3.0×10-5 mol/L with a detection limit of 1.0×10-7 mol/L(S/N=3).The method was applied to direct determinat...