Page 1 of 1
peaks tailing
Posted: Fri Dec 20, 2013 9:53 am
by labchi
good morning to all,
My question is very simple.
Is possible to improve peaks tailing acting on the set up of the FID detector?
I talk about flows.
thank you very much
Re: peaks tailing
Posted: Fri Dec 20, 2013 10:54 am
by Peter Apps
Possible but unlikely. The inlet and the column, in that order, are far more likely to cause tailing than a detector gas flow (assuming that the column is properly installed of course).
Peter
Re: peaks tailing
Posted: Fri Dec 20, 2013 2:20 pm
by rb6banjo
What is your system (analytes, column, injection solvent, etc.)?
Re: peaks tailing
Posted: Sat Dec 21, 2013 2:00 pm
by Consumer Products Guy
Possible but unlikely. The inlet and the column, in that order, are far more likely to cause tailing than a detector gas flow (assuming that the column is properly installed of course).
Peter
Absolutely.
Re: peaks tailing
Posted: Sun Dec 22, 2013 8:03 pm
by ntruong
If you have no issue with the program run, you can do isothermal program, reduce flow, and injection volume.
Re: peaks tailing
Posted: Mon Dec 23, 2013 7:36 pm
by Arne
I would try these things first.
1. Change the inlet liner and do the same run.
2. Change the septum. Do the same run.
3. Could be column activity. Trim 1m or so off the column and do the same run.
Re: peaks tailing
Posted: Tue Jan 07, 2014 2:24 pm
by labchi
It was an acqueous injection, but I solved my problems by working on the flow on column.
Probably my analytes (alcohols) are not the best for the prescribed stationary phase (Rt Q BOND).
I think that the best is 624.
anyway thanks to all for your support
Re: peaks tailing
Posted: Tue Jan 07, 2014 3:30 pm
by Jesse Robinson
For aqueous injections I have had really good luck with the Rtx-Wax column from Restek. We run a variety of alcohols on this column and get good results.