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Stable Isotope Geochemistry

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Subject:
From:
"Heaton, Timothy HE" <[log in to unmask]>
Reply To:
Stable Isotope Geochemistry <[log in to unmask]>
Date:
Wed, 6 Jul 2005 16:12:47 +0100
Content-Type:
text/plain
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How long will primary IAEA standards last if we use them every day?

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 Anthony M. Faiia
Sent: 06 July 2005 15:17
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] Further Discussion on Carbonate Corrections


--- You wrote:
How about analyzing two, known but very different isotopic composition of
carbonates (NBS-18 and NBS_19) determining the slope and additive
correction every day and forget about calibrating the reference gas.  That
is what we did Revesz-Landwehr 2002;  RCM, 16: 2102-2114.
--- end of quote ---

That is the procedure we use as well. Ideally the samples will fall between the two standard values.

Anthony Faiia
Dartmouth College


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