I am very interested by this kind of subject and I would like to receive a
copy of your work, preferable in electronic form (if possible of course).
Thank you very much
Ana Isabel Janeiro
INETI - DTIQ - LAQAS
Estrada do Paço do Lumiar, 22
1648 - 039 - Lisboa - Portugal
Tel.: +351 217165141 - ext 2671/73
Fax : +351 217168100
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----- Original Message -----
From: "Mahendra P. Verma" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, October 08, 2004 10:26 PM
Subject: Re: [ISOGEOCHEM] equilibration time of CO2-H2O
> Recently, we did some work to understand the salt effect on the CO2-H2O
> isotopic exchange equilibrium. It will be published in the Proceedings of
> "Symposium on Quality Assurance for Analytical Methods in Isotope
> , IAEA, Vienna. The equilibrium also depends on other parameters, such as
> alkalinity, buffering capacity, pH, and amount of total dissolved CO2,
> which are still to be studied. If anyone is interested, I can send a copy.
> It looks with the discussion that one can reduce the analysis time with
> equilibrating CO2-H2O at higher temperature (say 40ºC). If it is really
> objective, the answer is NO. There will be other problems like water
> There will be substantial amount water vapor that will affect the oxygen
> isotopic analysis even one condenses the water vapor before injecting the
> CO2 into the mass spectrometer. CO2 is highly soluble in water. So, the
> condensed vapor will have some CO2 that will affect the isotopic
> of the equilibrated CO2. Although such experiments must always be
> encouraged, one gets sometimes valuable information with doing work
> the normal procedures.
> I hope it should be of some contribution to the discussion.
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