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Estimating Eh from DO

Hi Dave-
 
Sorry to bother you, I know you are busy...
 
I have been searching for a straightforward calculation to estimate Eh from DO in oxgenated surface waters - I stumbled across your Phreeqe IAQ but did not find the specific question answered.  I have field measured T, pH, but had the redox electrode go whack on me. 
 
Do you have a simple formula or can you provide me a reference where it can be obtained?
 
Appreciate your help!
 
Doug
 
 
Doug Craft
Fisheries Applications Research Group
USDI - Bureau of Reclamation
PO Box 25007, D-8290
Denver CO 80225-0007
dcraft@xxxxxxxxxxx
office: 303-445-2182  office cell: 303-870-5625 
office fax: 303-445-6328
home: bigdoug@xxxxxxxxx  303-458-8946

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