What are the main problems in front of the laboratory nitrogen blower

What are the main problems in front of the laboratory nitrogen blower 1.
Are the water bath nitrogen blower and dry nitrogen blower universal? The water bath type and the dry type are inapplicable to a certain extent.
For different samples, their stability is different at different temperatures, and the boiling point of the solvent is also different.
In addition, some samples are more sensitive to water quality, so the two cannot be completely universal
.

Each laboratory needs to procure for its own sample needs
.

2.
When concentrating the sample with nitrogen blowing, what is the basis for setting the temperature of the water bath? Usually, the temperature setting of the water bath is related to the properties of the components, and is generally set to about 40 degrees.
In addition, considering the sensitivity of the target sample to temperature and the tolerance of the sample, it is generally about 2~3 degrees lower than the boiling point of the solvent to be volatilized, and the high no more than 95 degrees
.

3.
Does the water volatilization of the water bath nitrogen blower pollute the sensitive samples? The temperature of the water bath type concentration water bath will not be too high.
Generally, the contamination factor of the sample on the volatilization of water is very small, which can be basically ignored.
Of course, it is not recommended to use a water bath for concentration if some samples that are more sensitive to water are excluded.
formula
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 　　4.
How big should the nitrogen blower blow nitrogen be? The control of the amount of nitrogen blowing depends on the sample.
According to the large amount of the sample and the degree of volatilization of the sample, it can be adjusted appropriately.
When the target sample is finally ensured, the nitrogen sweeping amount can be increased to accelerate the speed of concentration
.