David,

I am going to depart from some of the other suggestions that have been 
made.

Collect your sample in a glass bottle with a polyseal cap without any 
head space.  We prefer to use amber glass to suppress biological 
activity.  They are probably available in your chemistry stockroom.  If 
your purpose is to analyze the waters for hydrogen and/or oxygen 
isotopes, there is no need to freeze them, or refrigerate them for that 
matter, and they can be stored for years.


On May 22, 2006, at 6:09 PM, Sarah Grosshuesch wrote:

> I am a graduate student researching hydrogen stable isotopes within 
> the food web of an owl species.  In the process of planning for sample 
> collection, I am wondering what would be the best bottle for storing 
> water samples until they are processed, which may be several months. 
> About a 100 mL of water will be collected and stored in a freezer. 
> Which would be the best bottle for storage glass or high-density 
> polyethylene?  Also, what sort of bottle cap would be best to avoid 
> evaporation, etc.  Any advice would be greatly appreciated.
>
> Thanks,
>
> David Grosshuesch
>
> M.S. candidate
> Natural Resources Research Institute
> Univ. of Minnesota-Duluth
> 5013 Miller Trunk Hwy.
> Duluth, MN 55811
> 218-720-4382
> [log in to unmask]
>
>
-- 
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Steve Nelson
Associate Professor
Dept. of Geological Sciences
S-389 ESC
Brigham Young University
Provo, UT  84602

801-422-8688

"Guns don't kill people, Dick Cheney kills people."
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