Diffuse-light absorption spectroscopy by fiber optics for detecting and quantifying the adulteration of extra virgin olive oil
A. G. Mignani, L. Ciaccheri, CNR-IFAC - National Research Council- Institute of Applied Physics (Italy); H. Ottevaere, H. Thienpont, Vrije Universiteit Brussel (Belgium); L. Conte, M. Marega, University of Udine (Italy); A. Cichelli, G. D’Annunzio University (Italy); C. Attilio, A. Cimato, CNR-IVALSA – National Research Council-Trees and Timber Institute (Italy)
A fiber optic setup for diffuse-light absorption spectroscopy in the wide 400-1700 nm spectral range is experimented for detecting and quantifying the adulteration of extra virgin olive oil caused by lower-grade olive oils. Absorption measurements provide spectral fingerprints of authentic and adulterated oils. A multivariate processing of spectroscopic data is applied for discriminating the type of adulterant and for predicting its fraction.
