Column degradation

Chromatography Forum: GC Archives: Column degradation
Top of pagePrevious messageNext messageBottom of pageLink to this message  By Lana on Tuesday, July 13, 2004 - 12:23 am:

Hi
There are black spots in my column.Is it a sign of degaradation?
Thank you for replying me


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Jason Ellis on Tuesday, July 13, 2004 - 08:07 am:

Usually, that is a sign of contamination of the column by sample residues.


Top of pagePrevious messageNext messageBottom of pageLink to this message  By GC Dave on Tuesday, July 13, 2004 - 08:50 am:

I have had a similar problem with a supposed high temperature phase in the past immediately after I had conditioned it. The column was unusable (no retention).
I thought the spots might be cooked up stationary phase.


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