[LON-CAPA-users] parts per million as a unit

Robley Light lon-capa-users@mail.lon-capa.org
Tue, 10 Jul 2007 13:37:31 -0400

I gather that ppm is not an acceptable unit in LON-CAPA.  Is that correct?
(When I try to enter it as a unit, I get an error message that the computer
answer is wrong, and either the tolerance or the sig fig should be
changed--even though the answer is within both).

Does anyone else think this is a feature we should have (with, perhaps
conversions to ppb,ppt and pph --parts per billion, parts per thousand and
parts per hundred, or %), and conversions to, for example, mg/kg?  It is
easy enough to not include the unit in the answer and just enter it outside
the textbox.


Robley J. Light                  Professor Emeritus of Chemistry and
Department of Chemistry          Phone:   (850) 644-3844
   and Biochemistry              Email:  rlight@chem.fsu.edu  
Florida State University         Fax:      (850) 644-8281
Tallahassee, FL 32306-4390    Home Page:

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