Stability of sodium carbonate buffer

[Louis Hom]

In article <dtgugu$ja9$5 at news.doit.wisc.edu>,
DK <dk at no.email.thankstospam.net> wrote:
>
>If filter-sterilized (or good amount of azide added) and in a tightly 
>closed vessel ... forever, basically. 

	I would be at least a little worried about the effects of running 
the buffer through a vacuum filter, unless your pH is well above 7.4 (1st 
pKa+1), since below that pH you are in equilibrium with H2CO3 (which can 
yield gaseous CO2).
-- 
______________________________________________________________________________
Lou Hom >K'93			     
lhom at ocf.berkeley.edu		
http://www.ocf.berkeley.edu/~lhom/