I have noticed that several of my old exetainers seal better when I use caps that were ordered at the same time. If I try to thread new caps on some of the older exetainers I have with the old thread I can tell by feel that something is amiss. If I put an old cap (in my case they are either dark green, red, or light blue) the exetainer seems to seal fine (data from the Gas Bench supports this conclusion as well). I am still in the process of seperating the new threaded exetainers from the old to minimize cap/exetainer marriage mishaps.

Benjamin Miller
Manager, Idaho Stable Isotopes Lab
(208)885-6512
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-----Original Message-----
From: Stable Isotope Geochemistry on behalf of Seth Newsome
Sent: Tue 10/30/2007 5:12 AM
To: [log in to unmask]
Subject: [ISOGEOCHEM] Exetainer Leakage?
 

Hi All...

On a related note, we have been having problems with a recent batch  
of exetainer vials purchased from Labco (UK)... The vials are marked  
as the "new thread" design... About 1 in 10 seem to leak, which  
sometimes trips the source on the machine... Has anybody else had  
problems with recently purchased exetainer vials? I think Ill send a  
short note to the supplier... We've bought >1000 vials from Labco  
over the past 12 months and never had a problem with leakage... Our  
old beast of a machine (MAT 252) and GasBench are working fine...

Any insights would be appreciated...

Wombay Boy


On Oct 30, 2007, at 5:00 AM, Issam Moussa wrote:

> Dear all,
> We have a problem on our multiflow carbonates
> Bitter  to introduce samples or references carbonates in vials, after
> automatic injection of the acid, after a calibration in 70°C during  
> 2 heurs
> At the time of the analysis, there is no more CO2 in vials
> The CO2 escapes in the stage of preparation at the time of the  
> injection of
> the acid
> When I injectele CO2 in vials manually and I waits for 2 heurs I  
> discover
> the CO2
> So there is no problem of leaks on vials
> If you have to meet this problem, I waits you for proposition and  
> diagnose
>
> Issam

Seth Newsome, Ph.D.
Carnegie Institution of Washington
Geophysical Laboratory
5251 Broad Branch Road NW
Washington, DC 20015
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(202) 478-8987