PEG solutions

A. Van Laere Andre.VanLaere at
Wed Mar 17 04:28:27 EST 1999

You could try:
Money N.P. (1989).  Osmotic presure of aqueous polyethylene glycols.  Plant
Physiol. 91, 766-769.
Good luck

Virginia Berg <bergv at CHAOS.CNS.UNI.EDU> wrote in article
< at>...
> There is a way to use PEG solutions of various concentrations to control
> relative humidity.  I want to hold some stuff at a particular RH/water
> potential value by having it sit in a sealed container whose atmosphere
> at equilibrium with the PEG solution below.  (Actually, I want to do a
> of these at different RH/water potential values.)  Saturated salt
> don't give the values I want.  Can anyone point me to the right recipe?
> Thanks.
> --Gini Berg
> To me it seems that all sciences are vain and full of errors that are not
> born of experience, mother of all certainty.
> --Leonardo da Vinci (1452-1519)
> Virginia Berg  (bergv at
> Biology Department 0421
> University of Northern Iowa
> Cedar Falls, IA 50614
> (319) 273-2770 (phone), 273-2893 (fax)

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