Sensitive Voltammetric Determination of Dopamine at Salicylic Acid and TX-100, SDS, CTAB Modified Carbon Paste Electrode

摘要

A sensitive electrochemical method for the determination of dopamine (DA) was developed by usingsalicylic acid (SA) and TX-100, SDS, CTAB surfactants modified carbon paste electrode at phosphatebuffer solution pH.7. This kind of modified electrode showed excellent electrocatalytic activitytowards the oxidation of DA by the influences of different kinds of surfactants on the electrochemicalsignals of dopamine. Some parameters such as pH, scan rate, concentration and effect of surfactants ofdopamine were optimized. This approach is so easy, low detection limit, fast response, highreproducibility, low cost and simplicity.