Can sucrose undergo O-isotope exchange with water? In preliminary tests we are finding slight differences in d18O between IAEA CH-6 weighed out into capsules as a solid powder, and the same IAEA CH-6 dissolved in water and pipetted into capsules. All cases used well-homogenised powder and thorough freeze-drying.

Tim H.E. Heaton

NERC Isotope Geosciences Laboratory
British Geological Survey
Keyworth, Nottingham NG12 5GG, England
(www.bgs.ac.uk/nigl/index.htm)

Tel. +44(0)115 936 3401
Email: [log in to unmask]


*********************************************************************
This e-mail message, and any files transmitted with it, are
confidential and intended solely for the use of the addressee.
However, the information contained in this e-mail may subsequently
be subject to public disclosure under the Freedom of Information Act 2000 and, unless the information is legally exempt from disclosure, the
confidentiality of this e-mail and your reply cannot be guaranteed. If
this message was not addressed to you, you have received it in error
and any copying, distribution or other use of any part of it is
strictly prohibited. Any views or opinions presented are solely those
of the sender and do not necessarily represent those of the British
Geological Survey. The security of e-mail communication cannot be
guaranteed and the BGS accepts no liability for claims arising as a
result of the use of this medium to transmit messages from or to the
BGS.                               http://www.bgs.ac.uk
*********************************************************************