Polyviologen Modified Glassy Carbon Electrode Employed for Anodic Stripping Voltammetric Determination of Mercury(II)
作者： Kuan-Chiao Cheng , Po-Yu Chen
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摘要: In this study, a polyviologen modified glassy carbon electrode (PVGCE) was used to detect Hg(II) in aqueous solutions containing significant amounts of chloride anions order demonstrate the electroanalytical application electropolymerized polyviologen. The thin film formed on surface by applying constant potential −1.0 V pH 4.2 Britton–Robinson (BR) buffer solution that contains 0.1 wt% viologen oligomers. PVGCE found capability improve detection limit with high concentration because forms negative complex ions HgCl can be accumulated anion-exchange characteristic With 5 minutes accumulation at −0.2 V, adsorbed were reduced Hg and deposited surface, determined following anodic stripping differential pulse voltammetry (ASDPV). dependence current versus linear from 1 ppb (5 nM) 100 ppb (0.5 μM) regression coefficient 0.9959.
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