Dear Jerome,

You might have a look in the review publication:

Etienne Roth (1997) Critical evaluation of the use and analysis of
stable isotopes. Pure and Applied Chemistry, 69 no.8: 1753-1828.

He is including a review on optical methods for SI measurement and
gives a number of references for application on carbon isotopes.

Hope this is helpful,
Pier de Groot.
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Dr. P.A. de Groot
University of the Witwatersrand
Economic Geology Research Unit
Department of Geology
Private Bag 3
2050 Johannesburg
South Africa
Tel.    +27 11 7162564
Fax.    +27 11 3391697
E-mail  <[log in to unmask]>

Visit the combined HOME-PAGE of EGRU-Geology on the Internet:
         http://www.wits.ac.za/science/geology/index.htm
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