Low Recovery in Benzene and Retention Time Shift II
Posted: Thu May 17, 2007 6:45 am
Good Day!
Thanks for you're reply...
1. As of now we don't have toluene contam, we change the source of our purge water, bake the LSC and column and run a calibration standard. We always experience toluene contam. Thanks AICMM
2. We are using dimethyl polysiloxane column.
3. This last week of May we will install a shut-off valve for hydrogen because when we do a Preventive maintenace in Gc the engineer noticed that even if we turn off the Hydrogen Valve, the Hydrogen still flow and install a pressure regulator for Air and Hydrogen.
4. As of today we still get low recovery of benzene.. We wanted to change the J-trap but we dont have stock and we just change it two weeks from now... I really dont know what to do...
5.About the lamp, do you know the life span of of it? because im not sure but we already replaced the lamp last year... mid-month i guess...
6.We calculate the retention time for GRO using GRO standard... and Get the +/-3sd... Maybe if we install a pressure regulator in Air and Hydrogen and shut-off valve, the RT will improve.
Thanks really for all you're repl
Thanks for you're reply...
1. As of now we don't have toluene contam, we change the source of our purge water, bake the LSC and column and run a calibration standard. We always experience toluene contam. Thanks AICMM
2. We are using dimethyl polysiloxane column.
3. This last week of May we will install a shut-off valve for hydrogen because when we do a Preventive maintenace in Gc the engineer noticed that even if we turn off the Hydrogen Valve, the Hydrogen still flow and install a pressure regulator for Air and Hydrogen.
4. As of today we still get low recovery of benzene.. We wanted to change the J-trap but we dont have stock and we just change it two weeks from now... I really dont know what to do...
5.About the lamp, do you know the life span of of it? because im not sure but we already replaced the lamp last year... mid-month i guess...
6.We calculate the retention time for GRO using GRO standard... and Get the +/-3sd... Maybe if we install a pressure regulator in Air and Hydrogen and shut-off valve, the RT will improve.
Thanks really for all you're repl