Date of Graduation
Master of Science in Chemistry
ion selective electrodes, sodium benzoate, erbium (III) porphyrin, high pressure liquid chromatography, food, chemistry
There was a huge need to get concentrations quickly and accurately, so ion-selective electrodes were developed. These were needed for manufacturing purposes. There have been electrodes made out of Gallium (III), Indium (III), Thallium (III), Tin (IV), Manganese (III), Nickel, copper, aluminum, lutetium (III), and Erbium (III) porphyrins. This study used erbium (III) porphyrins in PVC membranes to estimate the concentration of benzoate in foods. The food are soy sauce, Diet Mountain Dew, and Diet Cranberry Juice. HPLC was used to confirm the concentration of benzoate in food. The membranes were not accurate in the determination of sodium benzoate in foods. The HPLC results were more accurate due to being more selective to benzoate than the ISEs were.
© Erin Marie Dierker
Dierker, Erin Marie, "Investigations Into Erbium (III) Metalloporphyrins as Ionophores in Ion-Selective Electrodes" (2012). MSU Graduate Theses. 1981.