Cautions on the use of freeze dryer

1. The surface area of samples prepared by vacuum freeze dryer should be as large as possible;

2, must be completely frozen into ice, if there is residual liquid will cause gasification spray;

3. Note that the cold trap of the vacuum freeze dryer is about minus 60 degrees, which can be used as a low temperature refrigerator, but you must wear insulated gloves to prevent frostbite;

4. Before starting the vacuum pump, check whether the water outlet valve is tight, whether the inflation valve is closed, whether the contact surface of the plexiglass cover and the rubber ring is clean and free of dirt, and that it is well sealed.