Dear friends,

I regularly receive samples of water in vacuum-sealed pyrex tubes
furnace-combusted with zinc shots for D/H analysis.
As I am not only doing such type of measurement, I often cannot perform
analyses immediately.
So I'd like to know whether these samples can be conserved for a while or
not. May someone of you provide me with references on the subject? I
personnaly cannot imagine hydrogen gas to diffuse through an amorphous
glass wall. But I was told by colleagues of me that D (preferentially to H)
could do bonds with SiO2 and thus induce fractionation.
Thanks for advices and help.

Pat

__________________________________________________________

Patrick DAUBY
Universite de Liège
Laboratoire d'Océanologie
Unité de Recherche en Biogéochimie des Isotopes Stables (URBIS)
B6 Sart Tilman
B-4000 Liège, Belgium
Phone: +32.4.3663322  -  3663307
Fax: +32.4.3663325
Beep: 0454.700.671 (inside Benelux only)
WWW: http://www.ulg.ac.be/oceanbio/urbis.htm
__________________________________________________________