Sender: |
|
Mime-version: |
1.0 |
Date: |
Thu, 18 Jan 2007 21:01:31 +0100 |
Reply-To: |
|
Content-type: |
text/plain; charset="ISO-8859-1" |
Subject: |
|
From: |
|
In-Reply-To: |
|
Content-Transfer-Encoding: |
8bit |
Parts/Attachments: |
|
|
Hi Jorge,
NGS2 is a hydrocarbon gas (methane in natural gas mixture) according to my
knowledge (see NIST web-site: http://deuterium.nist.gov/standards.html, or
in Table 40.6, page 893 of: M. Groening (2004) International Stable Isotope
Reference Materials, Chapter 40, In: Handbook of Stable isotope Analytical
techniques, P. de groot (ed.))
CO2 ref materials are available: RM8562, RM8563, and RM8564, on NIST site
with only C-isot. Values and in Table 40.6 including both C and O isotope
values:
RM8562 d13C: -3.76 plm 0.03 d18O: -8.45 plm 0.11
RM8563 d13C: -41.56 plm 0.06 d18O: -23.72 plm 0.11
RM8564 d13C: -10.45 plm 0.04 d18O: +0.19 plm 0.10
I hope this helps.
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] or [log in to unmask]
Associate editor for stable isotopes of eEarth on-line magazine
http://www.electronic-earth.net
Organizer of the Isotope Programme at the:
EGU2007 General Assemblee (Vienna, Austria, 15-20 April)
The programme can be found at: http://meetings.copernicus.org/egu2007
(Click at: Programme > Call-for-Papers/Abstract Submission)
Isotopes in Geosciences: Instrumentation and Applications [IG]
A Short Course on HR-ICP-MS is also arranged (subscription required
contact me):
(On EGU web-site: Go to Special Events and click on EGU Short Courses; look
at SC1)
High-Resolution Inductively Coupled Plasma Mass Spectrometry (ICP-MS)
Presented by: Isaac (Joe) B. Brenner and Meike Hamester
Visit my WEB-site about my ³Handbook of Stable Isotope Analytical
Techniques², with a link to the Elsevier web site on the handbook (marked:
ŒOrder Now¹):
http://users.pandora.be/handbook/index.html
last update: August 15, 2005
Volume I is now available. Volume II is expected to be available in 2007.
****************************************************************
Why we are searching for extraterrestrial intelligence
While we lack it so much on Earth?
****************************************************************
|
|
|