Karami Hassan, Mousavi Mir Fazlollah
Department of Chemistry, Tarbiat Modarres University, P.O. Box 14115-111, Tehran, Iran.
Talanta. 2004 Jun 17;63(3):743-9. doi: 10.1016/j.talanta.2003.12.025.
A new dodecyl benzene sulfonate (DBS(-)) ion-selective electrode based on polyaniline is reported. The films of polyaniline doped with DBS(-) were prepared electrochemically on platinum electrodes in the solution containing 1.0x10(-3)M aniline and 7.0x10(-3)M DBS(-). The optimum potentiometric response was obtained for prepared polymeric film by passing electricity of 7.5Ccm(-2). The electrode exhibits an excellent Nernstian slope of -59.1+/-0.3mV per decade for DBS(-) ion over a wide concentration range (5.0x10(-6) to 4.1x10(-3)M) with a low detection limit (1.0x10(-6)M). The proposed electrode revealed good sensitivities for DBS(-) ion over a wide variety of other anions and can be used in the wide pH range of 5-10. It shows good stability, good reproducibility, wide range of pH independency and fast response (<20s) without using internal solution. This electrode could be used for the determination of DBS(-) in the real samples.
报道了一种基于聚苯胺的新型十二烷基苯磺酸盐（DBS(-)）离子选择性电极。在含有1.0×10(-3)M苯胺和7.0×10(-3)M DBS(-)的溶液中，通过电化学方法在铂电极上制备了掺杂DBS(-)的聚苯胺薄膜。通过施加7.5Ccm(-2)的电流，制备的聚合物薄膜获得了最佳的电位响应。该电极在较宽的浓度范围（5.0×10(-6)至4.1×10(-3)M）内对DBS(-)离子表现出优异的能斯特斜率，每十年为-59.1±0.3mV，检测限低（1.0×10(-6)M）。所提出的电极对DBS(-)离子在多种其他阴离子中显示出良好的灵敏度，并且可在5-10的宽pH范围内使用。它显示出良好的稳定性、良好的重现性、宽范围的pH独立性以及快速响应（<20s），无需使用内参比溶液。该电极可用于实际样品中DBS(-)的测定。
