SELECTION OF OPTIMAL DRYING CONDITIONS FOR ABOVEGROUND PARTS OF HYPERICUM SCABRUM AND HYPERICUM PERFORATUM

The process of Hypericum scabrum and Hypericum perforatum n/h drying in various installations, such as a drying cabinet without vacuum and under vacuum, an infrared radiation dryer, as well as drying with forced air ventilation at a temperature of 60 ± 5 °C. Taking into account the data on changes in the content of active substances and time consumption, it was established that the optimal drying conditions for Hypericum scabrum and Hypericum perforatum are drying at a temperature not exceeding 70 ° C with forced air ventilation for at least 5 hours. For this purpose, the following optimal drying conditions with forced ventilation n/h are determined. Hypericum scabrum and Hypericum perforatum: the thickness of the vegetable raw material layer on the dryer tray is 15 mm; the speed of the supplied air is 9 m / s; the process temperature is no more than 60 oC; the duration of the process is at least 5 hours.