Lambert, Christopher R.
Ion selective electrodes are widely used in the biochemistry and biomedical fields where the measurements of ion concentrations are essential. The problem with these electrodes is accuracy. This paper focuses on developing a more accurate ion selective electrode for potassium and ammonium ions. This was done by interacting 18-crown-6 ether on a gold surface with these ions and testing the electrochemical properties of these interactions. An electrical current was applied to the electrochemical cell in the presence of a reductive agent thereby cleaving a hydrogen group from the ammonium ion. This changes the size, shape, and charge of ammonium and therefore changes the way it interacts with the 18-crown-6. With this technology, you are increasing the accuracy of the electrode.
Worcester Polytechnic Institute
Major Qualifying Project
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