| Development of Ion Selective Solid Contact Electrode Based on Methyl-tri-octyl-ammonium Ion Ionophore for Iodide Detection |
| 메틸트리옥틸-암모늄 이온 Ionophore를 이용한 요오드 이온 선택성 고체 접촉 전극 |
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홍태기1, 이혜림1, 박운석1, 이영훈1, 한원식2 |
1한서대학교
2null |
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| Abstract |
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In this study, an iodide ion selective poly(aniline) solid contact electrode based on methyltrioctyl-ammonium ion ionophore as a sensing material was developed. This electrode was made of Me-TOA 2.0, PVC 30.0, and NPOE 68.0. The electrode exhibits a good linear response of 58.8 mV/decade (at 20 ± 0.2oC, r 2= 0.9998)within the range of 1×10-1 M~1×10-5.2 M KI solution. When the electrode was used with different alkyl chain ionophores and plasticizers, this electrode had the best result in response characteristics. The electrode showed a good selectivity for iodide ion than any other anions and is suitable detect it in aqueous solutions of pH 3.0~12.0. Their standard deviation in the measured emf differences was ± 1.2 mV at iodide sample solution of 1.0×10-2 M and ± 0.9 mV at 1.0×10-4 M. Their stabilization time was less than 125 sec, and response time was less than 22 sec. |
| Key Words:
ISE, SCE, selectivity, ionophore, iodide ion |
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