Dielectric Sensing (Capacitive) On Cooking Oil's TPC Level

Abstract

Total Polar Compound (TPC) is a chemical parameter, which reflects the deterioration of the high temperature of cooking oil. The repeated use of cooking oil at high temperatures results in the generation of undesirable substances, which may cause health problems. This project designed a sensor based on capacitive (dielectric sensing) using interdigitated electrode (IDE) to detect the TPC level of cooking oil obtained from the experiment to measure the electrical properties and matched it to the TPC level of the oil samples. A total of 15 samples of 150 ml palm oil was heated up to 15 hours. The expected result determined the levels of TPC in cooking oils obtained from the experiments and showed its relationship to the capacitance of the samples. The dielectric properties of oil samples were investigated in the frequency range of 0.1-10 kHz. The stability and the sensitivity of the result were measured in terms of frequency with the linearly increased capacitance as the oil samples were heated. The results analysis of significant correlation between the electrical capacitance of the oil sample with TPC against heated time with R2 ranged from 0.805 to 0.852.