At 20/08/2004 20:35, you wrote:
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>I have not used PTFE-FEP tube myself. But it would seem useful for this
>purpose. Both Wilmad and Norell sell it. Here is some description from
>Wilmad's catalogue (p.72):
>
>For 29Si studies, the teflon tube liners can be inserted into an NMR
>sample tube where the bottom 50-60mm of the sample tube has been
>removed. (They said you can see their Resonance Report NMR-012 online at
><http://www.wilmad-labglass.com>www.wilmad-labglass.com)
>
you have also quartz tube in the probe which give background signal
in the past, we used teflon 10mm tube and an old probe with quartz tube in
the probe removed
now , we use a mas probe with o-ring caps , slow rotation (500hz) because
samples are mixture of solid and liquid
>I wonder if anyone can provide me a suggestion on how to remove the
>background signal of the quartz NMR tube when I do Si-29 liquid state NMR.
>
>Best regards,
Guy Daelen
Namur
Belgium
Received on Mon Aug 23 2004 - 18:22:38 MST