AnsweredAssumed Answered

Excessive Column Bleed

Question asked by tom.hodsden on Aug 12, 2019
Latest reply on Oct 26, 2019 by tom.hodsden

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?