You can run the samples in an EA-IRMS but lipid extract first.  The lipids
tend to destroy the chemicals due to microdistillation prior to the flash in
the EA.  You will probably need about 10mg depending on the %S of course

Gilles

> -----Message d'origine-----
> De : Robert Van Hale [mailto:[log in to unmask]]
> Envoyé : 24 février, 2002 17:24
> À : [log in to unmask]
> Objet : [ISOGEOCHEM] Organic S extn
>
>
> Dear all,
> We have a student wishing to measure isotopic composition of
> organic sulphur
> in mussel tissue as a tracer for civic sewerage discharge.
> Can anyone please
> provide refs or notes for the methods of extraction of
> sulphur from tissue
> and collection as sulphate or sulphide.
> Thanks in advance,
>
> Robert Van Hale
> Department Of Chemistry
> University of Otago
> PO Box 52
> Dunedin
> New Zealand
> pH  (+64)(3) 479 7915
> Fax (+64)(3) 479 7906
> [log in to unmask]
> Isotopes'R'us
>