(February 10, 2016) Timur
Muksunov, research engineer at the SPhTI Laboratory for Security Methods,
Systems and Technologies has created a gas analyzer - "electronic
nose" that is able to assess the quality of the food, cosmetic, and
medical products, to diagnose diseases by human exhaled gases, and even detect
explosives and drugs.
However, according to the scientist, it is impossible to
make a sensor that reacts to only one gas – the system is needed to achieve
sensitivity and selectivity. This allows, when using certain processing
techniques, accurately recognizing the gas mixture in the air. Experiments confirm
this.
One of them was determining the freshness of fruits and
vegetables. Fruits and vegetables emit hydrogen sulphide, ammonia, and other
gases. The closer the date of writing off the products, the more of these gases
are in the air.