ETOH recycling

Lynn Raw lynn at LYNNRAW.F2S.COM
Wed Jun 15 22:33:00 CDT 2005


Not so tongue in cheek, I suggest that you contact your national department
responsible for excise duty on ethanol (currently in excess of 7 euros per
litre) before you try to redistill your stocks. I suspect the penalties for
operating an illegal still could be quite high so it would be best to make
sure that you are legal before proceeding.

Lynn Raw
London, UK

----- Original Message -----
From: "Gianluca Polgar" <polgar at ALFANET.IT>
Sent: Tuesday, June 14, 2005 1:18 AM
Subject: [TAXACOM] ETOH recycling

Dear all,

does anyone know wether it's possible to recycle ETOH solutions for DNA
I often have to change the solution of the jars where I preserve fishes
(initial conc.: 95%vol= 92.4%wt) and I wonder wether there's a method to
recycle all that expensive ETOH solution!
I tried to distill it, but I don't know how to determine the ETOH
concentration from the boiling temperature of the solution.
Of course the solution that I intend to recycle contains lots of components
that the samples (fishes, in my case) released.
The second and third fractions have a boiling temp. of 82-85°C, much higher
than the boiling point of the azeotrope (95wt% ETOH: about 78°C)...

Is there a "rule of thumb" method?
I have to obtain a 90-95% ETOH solution at last.




Gianluca Polgar
Ph.D. student
University of Rome "La Sapienza"
Rome, Italy

tel. 3488851198/ 0637518472
e-mail: polgar at - Gianluca.Polgar at

"Coordinamento Italiano dei Biologi Evoluzionisti" (CoEvol)
"Italian Committee of Evolutionary Biologists" (CoEvol)

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