Dear Ecophys and other CO2 People - I was wondering how you determine
that the concentration of CO2 in your tank that you use for doing gas
exchange, is accurate? I used to be able to buy a tank from NIST, but
no longer. And even though you can purchase a tank from Scott (or Air
Liquide), the specified concentration is not always what they say it is
(i.e., 388 vs 400 on a recent tank of mine!). However, I am not
confident that the tank used to calibrate my tank is accurate, since it
was not NIST traceable.
What are people doing these days to insure that their tanks are
accurately calibrated? Or are we all using inaccurately calibrated
tanks without knowing so?
Thanks.
Howie Neufeld
--
Dr. Howard S. Neufeld, Professor
Department of Biology
572 Rivers Street
Appalachian State University
Boone, NC 28608
email: [email protected]
departmental webpage: http://www.biology.appstate.edu/faculty/neufeldhs.htm
personal webpage: http://www.appstate.edu/~neufeldhs/index.html
Tel: 828-262-2683
Fax: 828-262-2127
