Oligo stability in water at -20 C

[Dima Klenchin]

In article <pxpst2-1108981513070001 at pelli.pathology.pitt.edu>, pxpst2 at unixs.cis.pitt.edu (Peter) wrote:

>It is my guess that all Pure water is not created equal.  If one is using
>a milli-Q system(or similar system) then it is safe to say that the water
>is pH7 if you are reading >18mOhms of resistance. But if inferior water is
>used and it tilts toward acidic or basic pH then maybe more hydrolysis
>could occur.

Alas, no. pH of all "pure" water, be it "Milli-Q' or "Nano-Pure" or simple dd
is still around 6.0 and there is little you can do about it. 

        - Dima