Dear Peter,
It´s fine that you got my samples. I am in no great hurry, so analysing
them by the end of december is all right with me.
There is however a question mark on how long the sample tubes, with septum
cap, can keep the sample intact. With CO2, a storage time of 4 weeks does
not seem to affect the delta-13C or the amount of CO2, but with methane I
don´t know.
About "your" gas: I would appreciate it if you could dilute your methane
gas in Helium (or Nitrogen) so that there is about 5% methane in the 12 mL
vials at about atmospheric total pressure. I´ll probably run them as soon
as they come.
Keep going!!
Best Regards
Anders
At 11:51 2000-11-27 +0100, you wrote:
>Dear Anders,
>
>I recieved your samples today, thanks for that. I will analyse them to my
>best possible way as soon as possible. For the moment I am still waiting for
>the gas I have ordered, and I will let you know as soon as I recieve it. I
>will then send you some of my gas, and probably you will also recieve
>another gas from Bob Becker (I'm waiting for some news from him).
>
>"My" gas will be much higher in concentration, would you like me to dilute
>it here (with helium), or do you prefer me sending the 99.995% methane in
>the 12mL vials?
>
>As to return to your samples, it is very busy here for the moment, but I
>will try to have them analysed by the end of december.
>
>I believe it is indeed a good idea to do such a test, but I have however
>stopped posting the messages on the isogeochem list, since it would become a
>bit annoying for all the people not involved with this. I am still getting
>replies from people experiencing the same frustration that are willing to
>join the intercomparison. Somehow N.I.S.T must feel the heat in their neck,
>hence their respons all of the sudden...
>
>I would like to repeat that I really appreciate all the responses and that I
>believe we can make something out of this. I hope all this will keep on
>going with open minds.
>
>Best regards,
>
>Peter.
>
>---
>Peter Vervloedt
>Laboratory of Applied Physical Chemistry
>Faculty of Agricultural and Applied Biological sciences
>Ghent University
>Coupure, 653
>9000 Gent
>Belgium
>
>tel.: +32 (0)9 264 6048
>fax.: +32 (0)9 264 6230
>http://fltbwww.rug.ac.be/isofys
>
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Anders Ohlsson, forskare, FD i analytisk kemi
Institutionen för Skogsekologi
Sveriges Lantbruksuniversitet (SLU)
901 83 Umeå
tel. 090-786 5892
fax 090-786 7750 email: [log in to unmask]
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