Be cautious with heating: I've done that and degraded the Nafion to
the point that it had to be replaced....
University of Victoria
At 09:05 AM 16/06/2008, you wrote:
>I believe Nafion traps are fairly robust and don't "break down".
>Certainly material could flow through them that would degrade them.
>If you suspect the ability for it to remove water, you might try
>lightly heating it while helium is flowing...you will typically get
>a fair bit of water off. Perhaps you had a wet helium cylinder? Are
>you detecting a leak? I have had bad luck with the base of the
>sample open split that seems to begin leaking after thousands of samples.
> Andrew Schauer
>Department of Earth and Space Sciences
>University of Washington
>Seattle, WA 98195
>[log in to unmask]
>----- Original Message ----
>From: Joe Lambert <[log in to unmask]>
>To: [log in to unmask]
>Sent: Monday, June 16, 2008 7:21:24 AM
>Subject: [ISOGEOCHEM] Gasbench Nafion Traps
> I was hoping to get some advice regarding the two Nafion water traps
>in Thermo's Gasbench. Can anyone please explain the symptoms of a Nafion
>trap that is no longer functional? I'm assuming the trap directly after the
>sample needle is typically the first to go. Is there a way to test which
>trap has the problem? Finally, what is the expected life of Nafion traps?
>We've had about 7,000 samples through the machine with only a few hundred
>being water samples.
>Thanks in advance,
>Alabama Stable Isotope Laboratory
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