지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.1
- 수록면
- 149 - 154 (6page)
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Lead (II) ion selective poly(aniline) solid contact electrode based on 5,5'-dithiobis (2-nitrobenzoic acid) ionophore as a two sulfur atoms containing sensing material is successfully developed. The electrode exhibits good linear response of 25.6 mV/decade (at 20±0.2℃, r^2=0.9995) within the concentration range of 1.0×10^-1~1.0×10^-6 M Pb (II) solution. The composition of this electrode was ionophore : polyvinylchloride : 2-nitrophenyloctyl ether : potassium tetrakis(4-chlorophenyl)borate = 5.0 : 20.0 : 25.0 : 4.0. When we consider the results of using different lipotropic additive or mixed additive as like oleic acid or potassiumtetrakis(4-chlorophenyl)borate + oleic acid, poly(aniline) solid contact electrode based on 5,5'-dithiobis (2-nitrobenzoic acid)ionophore with only one potassiumtetrakis(4-chlorophenyl)borate lipotropic additive had the best result in response characteristics. The electrode shows good selectivity for lead (II) ion in comparison with alkali, alkaline earth, transition and heavy metal ions. This electrode is suitable for use with aqueous solutions of pH 3.00~6.80 and their standard deviation in the measured emf differences was±1.01 mV at lead nitrate sample solution of 1.0×10^-2 M and±1.75 mV at lead nitrate sample solution of 1.0×10^-4 M. Their stabilization time was less than 850 s and response time was less than 15 s. This electrode was successfully applied as an indicator electrode in potentio-metric titration of 60.0 ml of 5.0×10^-3 M Pb(NO_3)_2 solution against 1.0×10^-2 M chromate solution. The amount of lead ions in solutions can be accurately determined from the resulting titration curves.
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