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The autosampler tamperer - dislodged septa problems - help!

http://www.chromforum.org/viewtopic.php?t=5908

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The autosampler tamperer - dislodged septa problems - help!

Posted: Fri Apr 20, 2007 10:57 am
by Abarrallan
Anyone got a fail safe method/supplier to prevent the occurrance of "plugging" or "coring" coming from autosampler vial caps? We have a sporadic problem with large scale HPLC runs failing due to this.

We use silicon PTFE caps & seals for 2ml autosampler vials from McQuilkin which claims to prevent this from happening. Hmmmmm.

Posted: Fri Apr 20, 2007 3:29 pm
by DR
3 options:

1) side-port needles
2) pre-split septa (silicone rubber layer is split down the middle, ptfe film is not)
3) septa w/ just ptfe, no silicone rubber - these are available in screw tops, but crimp-on would be more reliable.
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