Hi Emma,
For _"internal"_ laboratory water standard you need rather greater tank
than ampules, because you have to use this standard every time when
doing isotopic determinations of waters. If you need more info, I can
provide you with some photos of my tank which is connected to argon gas
cylinder.
For _International_ water standards (VSMOW, VSLAP, VGISP... etc) in my
opinion it is better to divide them and seal in ampules; for my
standards I used 5 ml ampules with long "neck" (as provided by Chemglass
for example..) and I didn't use any gas when sealing ampules with
standards. Up to date (over 4 years) all standards are in good
conditions. The capacity of an ampule you should choose yourself
depending on how much water you need for one sample (for example...
equilibration with CO2 ..).
I hope it helped you a little ;-)
Good Luck,
Adam Porowski
*********************************
Adam Porowski, PhD
Hydrogeologist / Researcher
Institute of Geological Sciences
Polish Academy of Sciences
Twarda 51/55, 00-818 Warsaw, Poland
tel. +48 22 6978756
mobile: +48 601 234349
fax +48 22 6206223
e-mail: [log in to unmask]
*********************************
Użytkownik CROOKE, Emma napisał:
> Dear Isogeochem,
>
>
>
> I am in the process of establishing a laboratory water standard, and
> am considering sealing the standard in glass ampoules, as recommended
> by the IAEA.
>
>
>
> Has anyone had experience with using ampoules in this way, or have
> suggestions for which gas to seal the ampoules under and the best
> method to carry it out in bulk?
>
>
>
> Regards,
>
>
>
> **Emma Crooke**
>
> Institute for Environmental Research
>
> Australian Nuclear Science and Technology Organisation
>
> New Illawarra Rd, Menai, NSW 2234
>
> Postal Address: ANSTO, PMB 1 Menai, NSW 2234
>
> ph. +61 2 9717 9313
>
> ph. +61 2 9717 3779
>
> fax. +61 2 9717 9265
>
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