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Re: Shoulder in methanol peak
Posted: Sun Feb 14, 2016 5:00 pm
by chem111
Thank you!!
I'm learning a lot from all of you.
I will apply the changes you suggested and post the results.
Michael.
Re: Shoulder in methanol peak
Posted: Sun Feb 14, 2016 6:10 pm
by GOM
Hi Michael
Great
As a note of caution, just change one thing at a time to understand what is happening.
Perhaps try your 4mm liner with 100uL/sec injection speed splitless first, keeping all other conditions the same.
Regards
Ralph
Re: Shoulder in methanol peak
Posted: Mon Feb 15, 2016 9:08 am
by chem111
Thank you.
I will probably have the results by tomorrow.
Michael
Re: Shoulder in methanol peak
Posted: Mon Feb 15, 2016 6:20 pm
by GOM
Hi Michael
I am not sure of your time zone but if that doesn't work (or even if it does) try also, if you have the time
4mm liner with a 10:1 split and 100 and 500uL/sec injection speeds to compare.
Regards
Ralph
Re: Shoulder in methanol peak
Posted: Sun Feb 21, 2016 6:50 pm
by GOM
Hi Michael
Did you get a chance to try the changes?
Feedback to the forum members would be appreciated.
Kind regards
Ralph
Re: Shoulder in methanol peak
Posted: Sun Feb 28, 2016 10:54 am
by chem111
Sorry that i didn't get a chance to post.
I tried with a 4mm liner:
with injection speed of 100ul/min the shoulder got worse!
with injection speed of 700ul/min the peak shape improved but the shoulder is still noticeable.
I didn't get a change to try split injection.
I will probably try again in the next two weeks i hope because i don't have access to the GC right now.
And again sorry that i didn't post.
I will update as soon as i have a chance to try again!
Re: Shoulder in methanol peak
Posted: Sun Feb 28, 2016 4:42 pm
by GOM
Hi Michael
Thanks for keeping us updated - looking forward to hearing your split injection results
Regards
Ralph