POLYPYRROLE-DERIVATIVES SENSOR FOR TRADITIONAL ITALIAN CHEESES DISCRIMINATION BY LIBRA NOSE

摘要

We report the use of a new patented polypyrrole derivatives synthesized at Technobiochip for the development of novel series of nano-gravimetric sensors showing a high affinity for many classes of volatile organic and inorganic compounds (VOCs). 20 MHz AT-cut resonant quartzes were coated with the polypyrrole derivatives, applied to the Technobiochip Libra Nose 2.1 and used to distinguish different Italian cheeses. The different types of cheese aromas were evaluated by inspecting the headspace. Finally, we used Principal Component Analysis (PCA) to discriminate samples on the basis of the VOCs released.