huge ghost peaks

[jiangds06]

see huge peaks of decamethyl cyclopentasiloxane, octamethyl cyclotetrasiloxane,docecametyl cyclohexasiloxane,
Are they column bleeding, how can I get ride of them? Thanks a lot!

[James_Ball]

Are there any septa particles in the lower part of your injection port? If a piece of septa falls down into the injection port sometimes the solvent from the injection will extract siloxanes from the septa and make such peaks.

[jiangds06]

I figure it out. it is not in the system. probably from the cap.
it is in the

Are there any septa particles in the lower part of your injection port? If a piece of septa falls down into the injection port sometimes the solvent from the injection will extract siloxanes from the septa and make such peaks.