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| Date: | Wed, 3 Nov 2004 17:12:19 +0100 |
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Dear Fabio,
There are three pure CO2 gas standards available from either NIST or IAEA
(for their web sites, use these acronyms for searching with Google or
another search engine on the web - you will find them for certain then, or
alternatively look into the addresses/URLs given on the Isogeochem
web-site!):
RM8562 d13C: -3.76+-0.03 d18O: -8.45+-0.11
RM8563 d13C: -41.56+-0.06 d18O: -23.72+-0.11
RM8564 d13C-10.45+-0.04 d18O: +0.19+-0.10
You also can look into:
Verkouteren, R.M. (1999) Preparation, characterization, and value assignment
of carbon dioxide isotopic reference materials: RMs 8562, 8563, and 8564.
Anal. Chem., 71(20): 4740-4746.
for details about the standards.
NIST
Hope this is what you are looking for.
Best wishes, Pier.
****************************************************************
Delta Isotopes Consultancy
Dr. Pier A. de Groot
Pastoor Moorkensstraat 16
2400 Mol - Achterbos
Belgium
Tel. +32 (0)14 326 205
e-mail: [log in to unmask]
Visit my WEB-site about my ³Handbook of Stable Isotope Analytical
Techniques²
at:
http://users.pandora.be/handbook/index.html
last update: October 1, 2004
Volume I is expected to be available in November 2004
****************************************************************
> Dear all
> I'm looking for some different tipologies of standards.
> Going into details my request are:
> -A 14C Blank (preferibly a graphite blank)
> -A pure CO2 monouse sealed 13C standard.
> Does anybody know some adresses (also website) where these standards are
> available?
> Thank You
> --------------------------------
> Fabio Marzaioli Ph.D Student
> Seconda Uniersitą degli Studi di Napoli
> Facoltą di Scienze Ambientali
> Via Vivaldi 43, 81100 Caserta (Italy)
> -------------------------------
>
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