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Stable Isotope Geochemistry

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from mail.tamu.edu (MAIL.TAMU.EDU [128.194.103.4]) by moose.uvm.edu (8.7.Beta.9/8.7.Beta.9) with SMTP id NAA112148 for <[log in to unmask]>; Wed, 26 Jul 1995 13:59:48 -0400 from geopsun.tamu.edu (GEOPSUN.TAMU.EDU [128.194.195.16]) by mail.tamu.edu (8.6.10/8.6.10) with SMTP id MAA19124 for <[log in to unmask]>; Wed, 26 Jul 1995 12:59:47 -0500 from [128.194.195.42] (ISOTOPMAC.TAMU.EDU) by geopsun.tamu.edu (4.1/SMI-4.1) id AA06957; Wed, 26 Jul 95 12:58:43 CDT
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Wed, 26 Jul 1995 13:03:08 +0100
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With regard to GC-IRMS standards, Chuck Kennicutt here at TAMU (409
690-0095; fax 690-1252) sent me a notice concerning reference standards he
is marketing through the company CHIRON AS.  I have no experience with
them, but it says on the flyer that these standards were jointly developed
by Chevron Petroleum Technology Company, Finnigan-MAT, and CHIRON.  For
further information, contact:

CHIRON AS
Mahlon C. Kennicutt II
13161 HCM Circle Dr. 
College Station, TX 77845


>
>I've been following the discussion on standards with interest, GCIRMS presents
>its own unique set of problems in calibrating standards. We use internally
>calibrated high purity compounds that we use both as internal standards in real
>samples and as a measure of the external precision (by Simon's definition).
>There are still, to my knowledge, no international standards for this method
>though we, and I imagine many other labs, have run inter-lab experiments. 
>
>Iain
>
>------------------------------------------------------------------------------
>Iain Gilmour                                      Office: +44 (0) 190 865 5140
>Organic Geochemistry Laboratory                      Lab: +44 (0) 190 865 2158
>Department of Earth Sciences                         Fax: +44 (0) 190 865 5910
>The Open University
>Milton Keynes, MK7 6AA
>------------------------------------------------------------------------------


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