THE PREPARATION AND PROPERTIES OF LIQUID MEMBRANE ELECTRODES FOR p-AMINOBENZOIC ACID AND NICOTINIC ACID

Abstract

The liquid membrane electrodes for measuring p-amino-benzoic acid and nicotinic acid were developed. Tetradecylammonium p-aminobenzoate ion pair complex and tetradecylammonium nicotinate ion pair complex were used as ion-exchangers of the electrodes. The electrodes were examined in terms of their effect of pore size of membrane, response curves, response time, pH of sample solution, temperature, selectivity coefficients and life-time. The slopes of calibration curves of p-aminobenzoate and nicotinate electrodes were -59.11mV/decade and -59.12mV/decade in the linear parts, and coefficients of correlation were 0.9999 and 0.9997, respectively.