Hi all,

1) How do you obtain a controlled 25*C for phosphoric acid digestion 
of carbonate in your lab? My lab varies around 22*C. It seems as though 
most water baths with heating option only control from 5*C above ambient 
to 99*C. Do you use a chiller model then or are you lucky enough to have a 
lab that is 20*C? Please either outline your method if home-built or 
provide a part number and manufacturer for your bath.

2) How do I know that my 25*C will be the same as your 25*C?

Thank you.


Andrew Schauer
Earth and Space Sciences
University of Washington
Seattle, WA 98195

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