1,2-bis(N,N’-benzylthioureido)benzene을 ionophore로 이용한 수은 이온 선택성 고체 접촉 전극
한원식1·오세림1·이정란1·안성민2·홍태기1
1한서대학교 화학과, 2가천대학교 방사선학과

Mercury Ion Selective Solid Contact Electrode Based on
1,2-bis(N,N’-benzylthioureido)benzene Ionophore
Won-Sik Han1, Se-Lim Oh1, Jung-Ran Lee1, Sung-Min Ahn2, and Tae-Kee Hong1
1Dept. of Chemistry, Hanseo University, Seosan, Korea
2Dept. of Radiological Science, Gachon University, Incheon, Korea
Received February 15, 2013/Revised March 15, 2013/Accepted March 28, 2013

Mercury (II) ion selective poly(aniline) solid contact electrode based on 1,2-bis(N,N’-benzylthioureido)benzene
ionophore as two sulfurs containing sensing material is successfully developed. The electrode exhibits
good linear response of 29.8 mV / decade (at 20±0.2oC, r2=0.9954) within the concentration range of 1×10-2.0
~1×10-6.0 M Hg (II). The composition of this electrode was 2BTB 2.5 : polyvinylchloride 16.5 : 2-nitrophenyloctyl
ether 30.5 : potassiumtetrakis(4-chlorophenyl)borate 2.0. The electrode shows good selectivity for mercury
(II) ion in comparison with alkali, alkaline earth, transition and heavy metal ions. This electrode is suitable
for use with aqueous solutions of pH 3.0~7.0 and their standard deviation in the measured emf differences was
±1.21 mV at mercury nitrate sample solution of 1.0×10-2 M and 1.0×10-3 M, respectively. Their stabilization
time was less than 72 s. and response time was less than 50 s.

Key words: Hg, Hg electrode, Ion selective electrode (ISE)