Hello Lindsey

The amount of water depends on the bicarbonate content and how much Co2
your machine can measure.  We have used as low as 5 to 10 ml in the
technique we use.  Here is the reference in case you want to check it out

Atekwana E.A. and Krishnamurthy, R.V., 1998. Seasonal variations of
dissolved inorganic carbon and ?13C of surface waters: Application of a
modified gas evolution technique. Journal of Hydrology 205, 265-278.

Eliot Atekwana                  Assistant Professor
Department of Geology           (317) 274 7969 (office)
IUPUI                           (317) 274 7484 (dept.)
723 W Michigan Street           (317) 274 7966 (fax)
Indianapolis IN 46202-5132      e-mail:  [log in to unmask]
www.geology.iupui.edu


-----Original Message-----
From:   Mulkins Lindsey M [SMTP:[log in to unmask]]
Sent:   Tuesday, July 13, 1999 2:11 PM
To:     [log in to unmask]
Subject:        Stable Carbon Isotope Analysis

I would like to know approximately how much seawater and freshwater is
needed to do a stable carbon isotope analysis?

Thank you,

Lindsey.