Chromatography Forum

The PTV liners that I have seen with factory glass wool packing have much too much wool in them for your application. They fill the whole liner with wool in order to hold 5 - 10 ul large volume injections. You need just a small amount of wool just below the needle tip.

The independent suppliers like Restek and Supelco often have a wider range of liners than the instrument manufacturers themselves.

Peter

Hello all,

finally the principle problem seems to be the injection volume.
With 0.5 µl it works much better.
Still we will buy other liner to improve the reproducibility.
We have only standard liners with quartz glass and no wool at all.

Thanks for all hints


Thomas

PS: we have the deactivated liners now wit a lot of glass wool inside. Not the whole liner is filled, but about 9 mm.
Which volumes need to be used for such a liner? Are this large volume liners for 20 to 40 µl ?
If I reduce the wool amount, how will I be able to get reproducible experiments?