The Voronezh National Institute of Technology has developed a wide range of sensors based on piezoelectric quartz resonators for many years. The most critical part of the sensor is a quartz sheet, the surface of which is covered with a special film that selectively absorbs molecules of the desired substance in the air without absorbing other substances. At the same time, the sensor resonator emits vibration at a certain frequency, and the vibration frequency depends on the weight of the resonator itself and the film covered. The more the substance to be detected is absorbed by the resonator, the more the frequency of the vibration of the resonator changes, and the concentration of the desired substance can be determined.
In the modern urban air, such as the decoration of the living room, the air composition is very complicated, and there are many toxic components that endanger the health of the body. Phenol is a harmful component in the air and it is not easy to detect accurately. In order to detect the content of phenol in the air, Russian researchers thought of using bioactive substances as raw materials, and mushroom "Weshenka" is one of them.
In the study, the researchers first developed the mushroom into a powder, and then extracted the mixture from it with various solvents, and then added it to the sensor's resonator. The experiment found that the mixture extracted from the mushroom has high sensitivity to the detection of phenol, and the selectivity is also very good. It can even detect the extremely low content of phenol in the air with an accuracy of 3 mg per cubic meter.
But researchers are still unable to explain the specific composition of mushroom extracts and why it can only absorb phenol, and researchers will continue to follow up on research. Experts pointed out that the results have practical significance.
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