KD Scientific Centrifan PE - Manual (Page 25)

Operation
Centrifan TM PE Personal Evaporator 3-3
3.2.2 Frozen Water Bottle Convenience with Higher-Boiling Solvents
a) If the solvent to be condensed has a higher boiling point such as Water, IPA, DMF, or
DMSO, frozen water is probably sufficiently cold to condense the vapor from the
recirculating gas and give a good evaporation rate. Freezing an appropriately sized
water bottle is a convenient, no-mess way of condensing most solvents in the trap.
Note: The amount of vapor removed from the recirculating gas as it passes
throught the trap and around the internal cold finger is dependent upon the
temperature of the trap surfaces and the residence time of the vapor. The dryer the
gas which is returned to the Centrifan
TM , the more vapor it will be able to carry to
the trap as it continues to circulate.
b) Gently lower a frozen water bottle into the top of the cold trap and then pour a small
amount of solvent (denatured ethanol or ethyleneglycol) into the space between the
trap and the bottle to maximize thermal conduction.
Note: Do not use water between the trap and the bottle because it could freeze and
cause damage to the unit.