Dear Jean-Baptiste and Matt,
Please keep me in the loop. I am also very interested in precisely
referenced CH4 with isotope ratios of any natural abundance as well as
in the method used for the referncing or production of this kind of CH4.
We have some fossil CH4 of which the d13C is referenced to -39.56 +/-
0.04 (VPBD vs. RM 8563) permil and the d2H to −170.1 +/- 0.7 permil (vs.
VSMOW2, SLAP2) if that is of interest.
The very best,
Niels Bohr Institute, Centre for Ice and Climate
University of Copenhagen
Juliane Maries Vej 30
2100 København Ø
On 2013-01-22 16:54, JB Hibon wrote:
> Dear Matt,
> I might be able to help. Where are you based?
> Best wishes
> Jean-baptiste HIBON
> FROM: Stable Isotope Geochemistry [mailto:[log in to unmask]] ON
> BEHALF OF Matthew, Matt
> SENT: mardi 22 janvier 2013 16:51
> TO: [log in to unmask]
> SUBJECT: [ISOGEOCHEM] FW: Sourcing of Isotopes
> Our company specializes in manufacturing accurate blends of gas
> mixtures. We are seeking sources of the following pure gas products…
> · Isotopically characterized or purified materials, such as 13CH4,
> 13CD4, 14N2 (all 14N), H234S, etc.
> o High purity methane with a very low 13C content.
> o Higher hydrocarbons - C4s and C5s - with at least one 13C or one
> 12C in the molecule (location is not critical)
> o Hydrocarbons where the H content is depleted in D below normal
> levels, e.g., C1H4, etc
> · Capability of isotopic labeling or small-scale custom synthesis
> o Some of our adjusting materials may have to be made "from
> Can you share the names of custom manufacturers of such isotopic
> · Capability of isotope ratio mass spectrometry analysis service to
> accurately determine delta values for the isotopes we are interested
> o Ability to measure 34S / 32S mass ratios in GAS samples is of
> particular interest.
> Typically, gas purities of 99+% would suffice. Quantities of gases
> expected to be in the 1 to 5 standard liters range each.
> Instead of replying to the List, could you please e-mail your
> responses to me: [log in to unmask] 
>  mailto:[log in to unmask]