| Abstract: |
Laser Diodes in Sensor Detect Quality Differences in Olive Oils Photonics.comDec 2018 MADRID, Dec. 26, 2018 — Researchers at the Complutense University of Madrid (UCM) and the Scintillon Institute have designed a sensor that can detect counterfeit olive oil labeled as extra virgin or protected designation of origin. Laser diodes in the sensor detect fluorescence levels in the oils, which differ slightly between the adulterated and pure extra virgin olive oils. To test the system, over 450 binary blends composed of protected designation of origin extra virgin olive oil (PDO EVOO) in date were adulterated with expired PDO EVOO and analyzed using fluorescence spectroscopy. The researchers measured the fluorescence emission of each sample using a laser diode as a source light and calculated 20 chaotic parameters from the resulting spectra. |
