Will the lipids dissolved in positive hexane evaporate along with the solvent?

: Recently extracted lipids with positive hexane after the refrigerator (ependorff tube), the result of the solvent are volatile, please ask you again with solvent dissolved, inside the fat content will change?
: Friend, you mean a change in concentration, don't you? That is, the quality changes. The solution I've had in the fridge will change, and the longer the time, the greater the change! If you mean that the percentage of multiple ingredients changes then use your glowing sample to re-establish the appearance, seal with the seal film, measure its stability! Oh if stable congratulations on pulling, extraction does not need to concentrate on their own volatile, ha ha craft is good, is a waste point can not be recycled!
: Everyone in the storage of
-control products
will have such a problem, put in the refrigerator for a period of time, no matter how good your seal, the solvent will be somewhat waved off.
I do this, after the matching control, with the analysis of
balance
weighing, remember the weight. Then weigh it again the next time you use it, and if you reduce the weight compared to the last time, make up the weight according to the weight you weighed in front of you. The general control product itself will not wave off, so as to maintain the concentration of our matching control solution is accurate..