Suffice to say it's doable, and straightforward, but very messy and not cost effective unless you can fractionally distil an alcohol *and* propylene glycol (boils 200+C).
Am pretty sure I shared the protocol on this list previously..
Patrik D'haeseleer <patrikd@gmail.com> wrote:
On Monday, March 23, 2009 10:35:28 AM UTC-7, Aaron Hicks wrote:
Some of the older texts (1960s and 1970s) discuss purification of agar to increase clarity. It's a pretty involved process, but if anybody would like the references so they can go read about it themselves, I can look them up.
If I remember correctly, Cathal gave that a try. Don't remember if he ever gave a thorough summary of his experience with this, other than that it was very messy...
Patrik
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