Hello, in our lab we have gone through two FLD flow cells that developed leaks in the past month. The first had a crack in the quartz cell, and the second cell appears to be leaking right behind the inlet port but does not have any leaks in the quartz cell. The FLD is being used on a 1290 system (G4220A, G4226A, G1316C, and G4212B upstream, no detector downstream).
Aside from user error, I was wondering if any of the scenarios we are running could be more risky in terms of developing a leak?
- Is the cell particularly fragile depending on the type of solvent (water, PBS, acetonitrile, methanol, ethanol), or solvent exchanges between these?
- Pump purging / Pump conditioning -- Does the FLD need to be disconnected when either of these is done?
- Would the inlet port leak be caused by an over-pressure (e.g. excessively high flowrate), or would this be some other problem?
If there are any other tips that we can incorporate into the user training, it would certainly be appreciated.