Stripping Analysis of Trace Arsenic Based on the MnO sub(x)/AuNPs Composite Film Modified Electrode in Alkaline Media

A simple, rapid fabricated and sensitive modified electrode for detection of As(III) in alkaline media was proposed. The modified electrode was prepared by co-electrodeposition of manganese oxides (MnO sub(x)) and gold nanoparticles (AuNPs) on the glassy carbon electrode (GCE) with cyclic voltammetry. Linear sweep anodic stripping voltammetry (LS-ASV) was employed for the determination of arsenic (III) without interference from Cu(II), Hg(II), and other coexisting metal ions. A lower detection limit of 0.057 mu gL super(-1) (S/N=3) were obtained with a accumulation time of 200s. The proposed method was successfully applied to determine arsenic (III) in real water samples with satisfactory recoveries.