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The design and experimental setup of a smart cap are presented. It is capable of sniffing the vapors of extra virgin olive oil, thus alerting the consumer or the retailer of any rancid flavor. The cap is made of an array of metalloporphyrin-based optochemical sensors, the colors of which are modulated by the concentration of aldehydes, the main responsible for rancid off-flavors. A micro-optic device, implemented to simulate a cap prototype, is presented. The spectral response of the chromophore-array is processed by means of multivariate data analysis so as to achieve an artificial olfactory perception of oil aroma and, consequently, an indication of oil ageing and rancidity. In practice, the cap prototype proved to be a device for non-destructive testing of bottled oil quality.
International Society for Optics and Photonics
Publication date: 
25 Sep 2007

AG Mignani, L Ciaccheri, AA Mencaglia, R Paolesse, M Mastroianni, D Monti, G Buonocore, A Del Nobile, A Mentana, MF Grimaldi

Biblio References: 
Volume: 6755 Pages: 67550V
Advanced Environmental, Chemical, and Biological Sensing Technologies V