Date of Graduation

Spring 2012

Degree

Master of Science in Chemistry

Department

Chemistry

Committee Chair

Erich Steinle

Keywords

ion selective electrodes, sodium benzoate, erbium (III) porphyrin, high pressure liquid chromatography, food, chemistry

Subject Categories

Chemistry

Abstract

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.

Copyright

© Erin Marie Dierker

Campus Only

Share

COinS