120th General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Exhibition Hall 2+3
Time 10월 20일 (금요일) 13:00~14:30
Code ELEC.P-491
Subject Determination of chromium(VI) using a gold-conducting polymer composite electrode
Authors Min Ouk Park, Won-Chul Lee, Yoon Bo Shim*
Department of Chemistry, Pusan National University, Korea
Abstract The dealloyed-AuNi-conducting polymer composite prepared by the potential step method is demonstrated for the detection of Cr(VI). The nanostructured electrode surface shows well-defined a voltammetric peak for the reduction of Cr(VI) at ~0.5 V. The modified electrode was characterized employing electrochemical and surface analysis methods. Experimental variables affecting the analytical performance were optimized. Interference effects of foreign metal ions having similar redox potentials were also investigated. The dynamic ranges of linear sweep voltammetry (LSV) and square wave voltammetry (SWV) for the target ion were between 1.0 ppb and 10.0 ppm, respectively with the detection limits of 0.85 ± 0.25 ppb (n=3) and 0.25 ± 0.05 ppb (n = 3). The reliability of the method for point-of-analysis was evaluated by analysing a standard reference material and water samples.
E-mail mwpark@pusan.ac.kr