Prussian Blue Coated Electrode as a Sensor for Electroinactive Cations in Aqueous Solutions

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• 作者：Houston Byrd ; Blake E. Chapman ; Christopher L. Talley
• 刊名：Journal of Chemical Education
• 出版年：2013
• 出版时间：June 11, 2013
• 年：2013
• 卷：90
• 期：6
• 页码：775-777
• 全文大小：218K
• 年卷期：v.90,no.6(June 11, 2013)
• ISSN：1938-1328

文摘

Prussian Blue (PB) is an excellent material as a sensor for electroinactive cations because of its electrochemical behavior and its zeolytic character. A simple 3-h laboratory designed for a quantitative analysis or an instrumental methods course is reported. This laboratory studies the transport of various cations into a PB-modified electrode upon reduction. Cyclic voltammograms are used to monitor the transport of ions such as K⁺ and Rb⁺ and observe the exclusion of Na⁺ and Mg²⁺ ions. The ability for cations to enter the PB film is a function of the hydrated radius of the cations being analyzed.

Keywords:

Upper-Division Undergraduate; Analytical Chemistry; Laboratory Instruction; Hands-On Learning/Manipulatives; Electrochemistry; Ion Selective Electrode; Instrumental Methods