Cyanide Ion Selective Poly(aniline) Solid Contact Electrode

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Research article

Journal of the Korean Society for Environmental Analysis 2012;15(4):314-319.

시안 이온 선택성 Poly(aniline) 고체 접촉 전극

이영훈, 이정섭, 남진수

한서대학교

Abstract

Cyanide ion selective poly(aniline) solid contact electrode based on quinine-Ni ionophore as a sensing material is successfully developed. The electrode exhibits good linear response of -50.2 mV/decade (at 20±0.2oC,r^2=0.9993) within the concentration range of 1×10^-1.00~1×10^-5.74 M of NaCN solution. The composition of this electrode was quinine-Ni ionophore 3.0 : polyvinylchloride 30.0 : dibutylphthalate 67.0. When we consider the results of using different plasticizers had the best result in response characteristics. The electrode shows good selectivity for cyanide ion in comparison with any other anions and is suitable for use with aqueous solutions of pH 5.3~7.8. Their standard deviation in the measured emf differences was ±1.60 mV at cyanide sample solution of 1.0×10^-2 M and ±1.12 mV at cyanide sample solution of 1.0×10^-3 M. Their stabilization time was less than 15 mins and response time was less than 52 sec.

Key Words: Metal complexed ionophore, Cyanide, Anion sensor, ISE, SCE