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Time：2022-01-01 Source：耀特仪器 Views：0 Tags:
Rotary evaporators, also known as rotary evaporators, are commonly used in laboratories. They are composed of motors, distillation bottles, heating pots, condensing tubes and other parts. They are mainly used for continuous distillation of volatile solvents under reduced pressure. They are used in biomedicine, chemical industry, chemistry and other fields. When using the rotary evaporator, you should pay attention to:
1. The water bath pot is not allowed to dry burn without water. Add water before power on.
2. The air tightness of each joint, vacuum tube and glass bottle will affect the vacuum degree, so it should be checked frequently.
3. Each interface, sealing surface, sealing ring and joint shall be coated with a layer of vacuum grease before installation.
4. If the viscosity of the distilled sample is high, the rotation speed should not be too fast. It is best to rotate slowly manually to form a new liquid level, which is conducive to the evaporation of the solvent.
5. When using, first draw a small vacuum, and then turn it on to prevent the distillation flask from slipping; When stopping, stop the rotation first, hold the distillation flask by hand, connect the atmosphere, and stop the vacuum pump after the vacuum degree drops to about 0.04MPa, so as to prevent the distillation flask from falling off and backward suction.
6. When rotating and evaporating air sensitive substances, connect a nitrogen balloon at the exhaust port, first pass a burst of nitrogen to discharge the air in the rotary steamer, and then connect the sample bottle for rotary steaming. After steaming, release nitrogen to boost pressure, turn off the pump, and then remove the sample bottle and seal it.