Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual page 75

3
CI Troubleshooting
Large peak at m/z 19
If the abundance of the peak at m/z 19 is more than half abundance of the
peak at m/z 17, then there is probably too much water in the system.
The system was not baked out sufficiently after it was last vented.
Bake out the system as described in the Maintenance chapter of this manual.
Moisture left over in the reagent gas supply tubing and flow module
Purge the reagent gas supply lines for at least 60 minutes.
Contaminated reagent gas supply
Replace the reagent gas supply and purge the lines and flow module.
Saturated methane/isobutane gas purifier
Replace the gas purifier.
5975 Series MSD Troubleshooting and Maintenance Manual 75