It is found that the sample preparation methods prescribed by the national standard are mostly nitrogen blowing and rotary steaming, but the vacuum centrifugal concentrator that has been tried by the laboratory is not able to enter. Why is this?
Vacuum centrifugal concentrator is to use vacuum to reduce the boiling point of solvent. Vacuum pump vacuum and / or supplemented by cold trap to collect evaporated vapor in time to complete the purpose of removing solvent and drying / concentrating samples. Because of continuous vacuuming, the boiling point of the solvent is reduced under vacuum, and the temperature of the sample is also reduced, which can effectively ensure the activity of the sample; a certain centrifugal force will always precipitate the sample at the bottom of the container with almost no loss; and may process many samples at the same time. Samples stored in multiple containers ·········
Personally, I feel that it is much stronger than nitrogen blowing and rotary steaming in terms of sample processing capacity, guaranteed sample activity, and concentration efficiency. Users have also reflected it well after trying it. It is estimated that there are fewer people who know?
On the other hand, is the national standard too classic and too late?
Chromatography, gas spectrum, etc. have very high requirements on samples, and they must be equipped with good sample pretreatment methods. Good horses are equipped with saddles. See the following powerful vacuum centrifugal concentration system:
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