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I am trying to find a working standard for use in carbon 13 analysis 
(solids)....I am looking in the range of +230 to +300 delta permil 
range.....  any ideas are welcome

We currently are using a working standard we made ourselves 10 years ago 
which has a value of +245 however we are running low and do not have any 
of that material left to grind into powder.

Shane

-- 
Shane Crabtree
Director of Instrument Development
Advanced Breath Diagnostics, LLC
105 Westpark Drive, Ste 150
Brentwood, TN 37027
Tel:  615.376.5464
e-mail:  [log in to unmask]