McGimpsey, W. Grant
Ion selective electrodes are widely used tools in the analysis of ion concentration in liquid media. They offer a low cost tool for performing continuous measurements of ionic activity in liquid samples. Ionophores or ion carriers are the key component of these electrodes. They facilitate the transport of unbound ions across hydrophobic membranes. 1-Aza-18-crown 6-ether was used as the ionophore in preparation of polymeric membranes to test its selectivity to potassium and ammonium. The membranes were incorporated into a Philips body electrode for testing. The Philips body electrode inconsistently exhibited a near Nernstian slope of 51.3 mV per decade and a linear range of 10^-5-1 M for potassium chloride.
Worcester Polytechnic Institute
Major Qualifying Project
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Chemistry and Biochemistry