For calibration of a LCA4 IRGA analyzer featuring a window including
the absorbance range of 13CO2, I need a mixture of 15ppm 13CO2 and
1000ppm 12CO2 in Nitrogen. I need the gas mixture in a Pressure
cylinder of aproximately 20 bar.

thank you,

Dr. Wolfgang Wanek
Department of Chemical Physiology of Plants
Institute of Plant Physiology
University of Vienna
Althanstrasse 14
A-1091 Vienna, Austria

Tel: + 431 31336 1432
Fax: + 431 31336 776
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