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NPD auto offset ramps too high, shuts down GC.     Packed column longevity.

Question asked by kyleqcrel on Mar 29, 2018
Latest reply on Jun 29, 2018 by james_jenkins

Hope your week is going well, can wait for spring to actually arrive.


When we turn auto offset on for either of our GCs, it ramps the output so high that it shuts down.  This is just for the nitrogen phosphorus detector.  We normally turn it off, but it turns back on every time we switch between the front capillary column FID and the back packed column.


Anyone know a acrylonitrile GC procedure that might work better?  Possibly with the FID.  The current packed column gets some carbon deposits at the front of the column and sometimes acts in a questionable manner.