>  > I am currently doing Post-Doc in University of Missouri,
>>  Department of
>  > biochemistry. For my research , I need to buy  water having heavy 
>18O(80 per
>  > mil or higher). If you could please provide some information such 
>as where I
>  > could get , I would appreciate it.

Hi,

Depending on how much of this water you need, you could also try 
"making" some of your own heavy water by evaporation - I did the same 
thing under very carefully controlled environmental evaporative 
conditions.  By this, I mean that I left 2 litres of lab distilled 
water in a beaker sitting on my windowsill for a couple of weeks. 
When it had evaporated to an approx. volume of 500 ml, the d18O value 
had increased from an initial value of -15 per mil to a final value 
of +16 per mil.  To get heavier d18O values, just let it evaporate 
further.

Of course, water may evaporate a bit faster here in Nevada than it 
will in Missouri.

Cheers,
Simon


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Simon Poulson
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