Fully automatic or semi-automatic vacuum nitrogen parallel evaporation concentrator

Abstract

The invention provides an automatic or semi automatic vacuum nitrogen parallel evaporation concentrating meter and relates to the technical field of solvent evaporation. The lower end of the meter body (1) is provided with a vortex vibration module (9), the meter body (1) is provided with a seal supporting plate (4) partitioning the interior of the meter body (1) into a lower nitrogen cavity (2) and an upper sample cavity (3), a plurality of sample tubes (5) are arranged in the upper sample cavity (3), the upper ends of the sample tubes (5) are provided with a liquid feed device (6), the sample tubes (5) penetrate the seal supporting plate (4) to connect to a film filtering system (7), and the lower end of the film filtering system (7) is provided with a collecting pipe (8). Since the nitrogen vacuum system and the film filtering system are combined ingeniously, the pressure difference serves as the power of nitrogen, the film filtering system serves as an 'automatic valve' between gas and liquid, bumping can be avoided, and the limitation of large-volume solvent concentration is small.

Description

Technical field: [0001] The invention relates to the technical field of solvent evaporation, in particular to a full-automatic or semi-automatic vacuum nitrogen parallel evaporation concentrator Background technique: [0002] At present, vacuum rotary evaporation and nitrogen blowing concentration instruments are widely used in laboratories as general experimental equipment. Rotary evaporation is mainly used for large volume solvent concentration, and nitrogen blowing concentrator is just a supplement to rotary evaporation, which can be used as a small Volume dissolves and concentrates. However, vacuum rotary evaporation can generally only rotate one sample at a time, the efficiency is very low, and it is prone to bumping and cross-contamination. Although the nitrogen blowing concentrator can produce 10-30 samples at a time, the volume of the solution is generally not more than 10ml, and as the volume of the solvent decreases, the nitrogen flow is not enough to blow to the ...

AI Technical Summary

Problems solved by technology

The air flow during the whole nitrogen blowing process is not well controlled, and the liquid solution splashes, resulting in loss of sample concentration

Moreover, cross-contamination between samples is easily caused by splashing

And after each operation, the steel needle should be thoroughly cleaned to avoid contamination of the next sample to be blown with nitrogen, and the operation is cumbersome

[0003] In recent years, foreign countries are also exploring parallel evaporation. Among them, there are two BUCHI vacuum parallel concentrators that are relatively successful, using a combination of vacuum and heating technology. However, due to the unsatisfactory evaporation efficiency, it cannot be controlled separately, and there is a risk of cross-contamination. It is possible but not widely used; the other is the Genevac ez-2 vacuum centrifugal concentrator in the United Kingdom, which uses a combination of vacuum, temperature and centrifugal principles to achieve parallel evaporation, but the evaporation flux for large volumes is still limited

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