I think that the "old" off-line method (azeotropic distillation + CO2
equilibration + IRMS analysis) is the best way of analyse hypersaline
Dipartimento di Scienze della Terra - UniversitÓ di Parma
(Earth Sciences Department - University of Parma)
Parco Area delle Scienze 157a
43100 Parma, ITALY
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----- Original Message -----
From: "Selva Marimuthu" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, December 08, 2004 1:19 PM
Subject: [ISOGEOCHEM] hypersaline samples
> Dear List members.
> I have been sending hyper saline water samples for deuterium and oxygen-18
> analysis. The lab uses pyrolisis method (Finnigan Delta Plus XL ion ratio
> mass spectrometer and Thermochemical Conversion Elemental Analyzer (TC/EA)
> peripheral to analysis these samples. I have been using these results
> correcting for the salt effect.
> Lately, I was told that measurements are usually difficult in hypersaline
> sample because of the saturation of salts is attained and therefore the
> isotopic effects become more complex as the exchange rate between CO2 and
> water slow down considerably.
> I'm bit confused, can someone explain to me how the pyrolisis method work
> hypersaline samples.
> Thanks in advance for any help.