You could try the freezer trick to attempt to crystallize and decant, but
it sounds like you need a vacuum line or freeze dryer. Your house vacuum
for the rotary evaporator is much weaker than the vacuums used for freeze
drying and a schlenk line.
On Jun 23, 2012 3:12 PM, "Dr Omar Hamarsheh" <ohamarsheh from gmail.com> wrote:
> Dear Colleagues,
>> we are trying to evaporate DMSO from plant extract before being used for
> purification in silica gel column. we tried to use rotary evaporator at 65
> C for 3 hours, but seems residual DMSO still existed. colleagues suggest to
> put the sample in freezer for 2 two days and them material
> will precipitate.
> I'll be so grateful for new ideas to remove DMSO.
>> thanks in advance,
>> omar hamarsheh, PhD
> Omar Hamarsheh, MSc., PhD
> Al-Quds University
> Department of Biological Sciences
> P.O.Box 51000
>> Tel: 00970-599197097
> Fax: 00970-22796960
>> Email: ohamarsheh from gmail.com> mail.alquds.edu/~f3706/
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