Application of ionic liquid to the construction of Cu(II) ion-selective electrode with solid contact

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• 作者：Cecylia Wardak ; Joanna Lenik
• 关键词：Solid contact ; Ionic liquid ; Copper-selective electrode
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：December, 2013
• 年：2013
• 卷：189
• 期：Complete
• 页码：52-59
• 全文大小：490 K

文摘

The potentiometric properties of copper ion-selective electrodes (ISEs) with solid contact based on polymeric membrane were investigated. Ionic liquids (ILs), alkylmethylimidazolium chlorides are used for the electrode construction as transducer media. The addition of ionic liquid to the membrane phase was found to improve the analytical parameters of the studied electrodes. The best results were obtained for electrode having membrane doped with 1-ethyl-3-methyl imidazolium chloride. The electrode shows a Nernstian response for copper ions over a wide concentration range (1 ¡Á 10^?7-1 ¡Á 10^?1 mol L^?1) and the slope of 28.9 mV decade^?1. The limit of detection is 3.2 ¡Á 10^?8 mol L^?1. It has a fast response time of 5-10 s and can be used for more than 4 months without any divergence in potential. The proposed sensor is not pH sensitive in the range 2.5-6.0 and shows a very good discriminating ability towards Cu²⁺ ion in comparison with some alkali, alkaline earth, transition and heavy metal ions. Moreover, it characterizes by high potential stability, reproducibility and fully repeatability.