Rotary evaporator steps

(1) Vacuum:

After opening the vacuum pump, it is found that the vacuum can not be checked. It should be checked whether the bottle mouth is well sealed, whether the vacuum pump itself leaks, whether the sealing ring at the shaft is intact, and the external vacuum tube

A vacuum switch in series can increase recovery and evaporation speed.

(2) Addition:

Using the system vacuum negative pressure, the liquid material can be sucked into the rotating bottle at the feeding port by a hose, and the liquid material should not exceed half of the rotating bottle. The instrument can be continuously fed, and it needs to be charged when feeding.

The first is to turn off the vacuum pump. Second, stop the heating. The third is to slowly open the tube cock after the evaporation stops, to prevent backflow.

(3) Heating:

When using the rotary evaporator, it must be energized before adding water. The temperature control scale is 0-99 °C for reference. Due to the existence of thermal inertia, the actual water temperature is 2 degrees higher than the set temperature.

Left and right, the set value can be corrected when using, for example, you need water temperature 1/3-1/2. Use the connector to remove the power plug.

(4) Rotation:

Turn on the electrical box switch and adjust the knob to the optimum evaporation speed. Take care to avoid fluctuations in the water bath and turn on the cooling water.

(5) Recycling solvent:

First open the feed switch to deflate, then turn off the vacuum pump and take out the solvent in the collection bottle.

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