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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 22, Number 10
BKCSDE 22(10)
October 20, 2001 

Studies on the Polythiophene(PT)/GC Electrode for the Determination of Some Metals by Differential Pulse Anodic Stripping Voltammetry (DPASV)
Kwang-Sik Yoo, Sang-Beom Woo
PT/GC, DPASV, Metals, Cu, Pb, Cd.
Studies were carried out on the fabrication of glassy carbon electrode modified with polythiophene (PT/GC). Cu(Ⅱ), Pb(Ⅱ), Cd(Ⅱ), and Zn(Ⅱ) were determined by using the PT/GC modified electrode by DPASV. The PT/ GC electrode was easily fabricated by cyclic voltammetry applying the potential from -0.5 V to +1.8 V (vs. SCE) at the scan rate of 50 mV/sec in 0.1 M thiophene -1 M tetrabutylammonium perchlorate (TBAP)-acetonitrile mixture. The thickness of the polymer film could be controlled by the number of potential cycling. PT/GC electrode showed Cu oxidation peak at 0.1 V vs. SCE, which is more positive potential than DME (at -0.1 V). The calibration graph for the Cu(II) was linear from 10 ppb to 450 ppb with correlation factor of 0.99. Anodic oxidation peaks of Pb, Cd, and Zn were observed at -0.5 V, -0.7 V, and -1.2 V vs. SCE, respectively. The PT/GC modified electrode could replace the conventional mercury electrode for the voltammetric study.
1141 - 1144
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