How to choose a good nitrogen blower?

First of all, you need to determine what kind of samples you are making and the requirements for sample concentration. Generally speaking, nitrogen blowers can be divided into dry nitrogen blowers and water bath nitrogen blowers, both of which can achieve their main functions. Their working principle is that by blowing nitrogen into the heated sample tube, the solvent in the sample can be quickly evaporated and separated, because nitrogen generally does not react with the sample, thus achieving the purpose of anaerobic concentration of the sample and keeping the sample more pure.

So what's the difference between dry nitrogen blower and water bath nitrogen blower?

In general, dry nitrogen fans conduct heat through aluminum blocks or sand. Generally, the temperature can reach above 100℃, that is, the heating temperature can be very high, and water vapor will not interfere with the samples at high temperature, but there is also a disadvantage that their heating uniformity is not very good.

Water bath nitrogen blower relies on water medium to conduct heat, so its temperature can only reach 100 degrees Celsius. If heated to 100℃, there will be water vapor, which may interfere with the sample in a closed environment, but its advantage is that the heating uniformity will be good. In the past, water bath was generally used.

Therefore, when customers choose, they mainly consider the characteristics of concentrated samples and the temperature to be carried out. The drying temperature is high and convenient, and the water bath heating is more uniform, so it is necessary to change the water regularly. After determining whether it is water bath type or dry type, the price mainly depends on the intelligence of the instrument, that is, the convenience and universality of use.