J Korean Soc Environ Anal Search


Journal of the Korean Society for Environmental Analysis 2013;16(4):250-255.
Tetraisopropylthiuram Disulfate을 Ionophore로 이용한카드뮴 이온 선택성 Poly(aniline) 고체 접촉 전극
한원식1, 이영훈2, 홍태기2, 최광선2, 박운석2
The study conducted an experiment with copper ion SCEs, which used tetraisopropylthiuram disulfate as an ionophore, by changing the composition based on six plasticizers and lipotropy. The composition that showed the best response slope and response characteristic against copper ion was found when ionophore:PVC:o-NPOE:KTpClPB was 5.0:20.0:25.0:4.0. This composition had a response slope of 35.5 mV/decade within the range of 1.0×10-1.0~1.0×10-7.0M. In terms of the effect of interference ion, a minor interference was observed in zinc, while most of the other ions experienced relatively little interference. They showed consistent potentiometric responses, unaffected by pH fluctuations between 5.0 and 8.0, with 260 seconds of stabilization time and 18 seconds of response time. This indicates that it may be allowed to make practical use of such response characteristics when pH is in the above range. The standard deviation measured ten times each on 1.0×10-2.0M and 1.0×10-3.0M copper solutions was found to be 1.31 mV and 1.92 mV, respectively. The lifetime of electrode was about four months. They showed the exact response to cadmium ion disappearing in the measuring solution through EDTA titration.
Key Words: ISEs, SCEs, Cadmium, Ionophore
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