AnsweredAssumed Answered

Excessive Column Bleed

Question asked by tom.hodsden on Aug 12, 2019
Latest reply on Aug 13, 2019 by noreuter

GC (7890A) - MS (5975C)

 

I am observing high column bleed and cannot locate the source of the problem (see photo attached).

 

I have checked for an air leak (see tune reports attached, before and after the problem arose) and no leak appears to be present. 

 

I have then cleaned the inlet port, tried a column bakeout, run over 10 blank samples and cut ~10 cm off the front of the column but the problem still persists.

 

This column is only 3 months old.

 

Can anyone suggest any other things I can do to locate the source of the problem before I requets an enigneer to come and take a look?

 

Thanks,

 

Tom

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