Karen

Would be interested to hear more about this service.

What's the lowest concentration of nitrate you can cope with? And, crucially, what are the issues for preservation/sterilisation? And prices/turnaround?

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]



-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]]On
Behalf Of Karen Casciotti
Sent: 21 March 2005 16:40
To: [log in to unmask]
Subject: [ISOGEOCHEM] nitrate isotopic analyses


Dear Isotopists,
My lab is now offering nitrogen and oxygen isotopic analyses of nitrate
using the denitrifier method (Sigman et al., Analytical Chemistry 2001;
Casciotti et al., Analytical Chemistry, 2002) on a cost per sample
basis as a service to the community. We can accommodate large
throughput, small sample volumes, in seawater or freshwater samples.
Sample requirements are 10-20 nmoles of nitrate per analysis. Costs
would be charged by purchase order. For those who are interested in
this service, please contact me directly for pricing and other
information.
thanks,
Karen

Dr. Karen Casciotti
Woods Hole Oceanographic Institution
Marine Chemistry and Geochemistry
360 Woods Hole Rd, Mail Stop 8
Woods Hole, MA 02543
tel: 508-289-3738
email: [log in to unmask]


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