A pneumatic crossflow nebulizer, modification of the Valente-Schrenk design, is used. The aerosol dehydration system consist of a specially designed spray chamber, in which a stationary temperature gradient is maintained, and a conventional helix condenser. The dependences of the uptake rate on the gas pressure and the gas flow are investigated, as well as the axial temperature distribution in the chamber. The nebulizer remains at 80°C and operates normally even with low dilutions of blood serum, whereas in the upper chamber part the temperature is 175°C.