The lower end of the guide tube glass cup to disk, use scissors to cut the bottom part of the top cone to obtain lower layer solvent flowing down off the petri dish. (Note: Only take out section just below the layer of solvent. When close flows end cap is on tight solvent to flow to a trickle and just walked out.) in order to evaporate the solvent in natural disc until completely dry. Attention should be well-ventilated place. Time to fly off the solvent around 15-20 minutes.
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