Abstract
An array of chemiresistors based on conducting polymers was assembled for the differentiation of VCO. The chemiresistor sensors were fabricated through the potentiostatic electrodeposition of polyaniline, polypyrrole and poly (3-methylthiophene) on the gap separating two planar gold electrodes set on a Teflon substrate. The electrical resistance of the sensors were measured and observed to change when exposed to the headspace of oil samples. The sensor response was rapid and exhibited good reversibility and reproducibility. Different signals were obtained for each coconut oil sample and pattern recognition techniques were employed for the analysis of the data. The developed E-nose system was able to discriminate VCO from refined, bleached and deodorized coconut oil (RBDCO) and rancid VCO.
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