EVOO is a high value edible oil, which is susceptible to adulteration and extension. This study looks at proof of concept for screening EVOO-filled containers non-invasively for adulteration without any sample extraction by capturing the differences in the dielectric properties of mixed oils. The
sensor system displayed a fast response (100 ms) and detection limits for different adulterants/extenders (refined olive oil (32.8%), rapeseed oil (19.4%), soya oil (10.3%) and castor oil (1.7%)), which is suitable for high-throughput (>60 sample/min) screening. The sensors do not work with metal containers, only plastic ones. Furthermore, a low-cost automated system prototype was tested to of translate the proof of concept for possible scaling up, but further work is required to expand the range of possible adulterants and reduce the detection limits.
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