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What should I pay attention to when purchasing a rotary evaporator?

Technical Knowledge 2017-03-10 16:18:38
Before buying a rotary evaporator, you need to consider four issues.First, what is the amount of distillation of the rotary evaporator? Second, what is the expected distillation solvent? What is the boiling point of the solvent? 4. What is the number of samples that need to be distilled?

Once you have determined the experimental requirements for distillation and the type of solvent, you can start buying a rotary evaporator. However, in the process of purchasing, we also have to pay attention to four issues.

First, develop a clear rotary evaporator specification. The specifications of the rotary evaporator are based on the volume of the evaporation flask. The size of the evaporation flask depends on the amount of material. In general, 2L, 3L, 5L rotary evaporators are suitable for small laboratory tests; 5L, 10L, 20L are suitable for medium-sized tests; and 5L, 10L, 20L are suitable for medium-sized tests and production.

Second, the number of distillation tasks that need to be completed by the rotary evaporator is clear. Distillation efficiency is critical, and it determines the number of samples that need to be steamed in a single day. In the same situation, the higher the distillation efficiency, the more samples can be distilled. Here, Xiaobian wants to explain again some factors that affect the distillation efficiency, such as the degree of vacuum of the system, the temperature of the heating pot, and the temperature of the cooling medium.

Third, it is necessary to assess the risks of its existence. The main risks of distillation are mainly from the distillation solvent and the heating medium. If the heating medium is silicone oil, the ignition temperature is 25 ° C higher than the heating plate temperature. A distillation solvent having a flammable, explosive, explosion-proof glass component is preferred. After the distillation is complete, it is correct to choose automatic deflation so as to avoid manual deflation that may cause an explosion. If it is necessary to optimize the laboratory, the auxiliary condensing unit can recover the distillation solvent to a large extent, which is also a good choice.

Fourth, after sales service. After-sales service is an important reference standard when purchasing a rotary evaporator, so there is no need to say more here. With the development of technology, Chinese-made products are highly competitive in the market and have received wide attention. At the same time, Chinese-made products are competitively priced and quality assured.

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