Dear Isogeochemers- I was wondering if there has been any new advice on 
what kind of CO monitor to buy for a IRMS lab?  Looking back it seems 
like the advice was to go for an expensive unit that requires periodic 
calibration.  Is this thought to still be the case or can one get by 
with the cheaper units, and if so (or if not) what units are people 
happy with after having used them?
Thanks in advance-Jay Brandes, Skidaway Institute of Oceanography