1,4,7,10-Tetrathiacyclododecane Ionophore를 이용한 카드뮴 이온 선택성 Poly(aniline) 고체 접촉 전극
Poly(aniline) Solid Contact Cadmium Ion Selective Electrode Based on 1,4,7,10-Tetrathiacyclododecane Ionophore
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Abstract
A new polyvinylchloride membrane sensor for Cd2+ ions based on 1,4,7,10-tetrathiacyclododecane as an ionophore was prepared. The sensor exhibits a Nernstian response for Cd2+ ions over a wide concentration range (to ~10-5.75 M) with a slope of 25.6 mV decade. It has a fast response time of 9 s and a stabilization time of 30 s. The electrode can be used in the pH range from 6.7 to 11.0. The proposed sensor shows fairly good discrimination ability towards Cd2+ ion in comparison with some alkali, alkaline earth, transition and heavy metal ions. It was successfully applied for the direct determination of Cd2+ in solution or artificial serum solution and, as an indicator electrode, in potentiometric titration of cadmium ions.
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