Peak Tailing on GC FID please help me !!!

Chromatography Forum: GC Archives: Peak Tailing on GC FID please help me !!!
Top of pagePrevious messageNext messageBottom of pageLink to this message  By jeffo on Wednesday, June 9, 2004 - 07:22 am:

I could really use some help. Im running an aliphatic hydrocarbon standard(straight alkane chain C9-C36) on my GC FID 5890. I have a new RTx-5 column which all of a sudden is displaying peak tailing on the early eluting hydrocarbons. The later eluting peaks C30- C36 are crisp and tight. My email is jeffo@eailabs.com. Can anyone email me with some tips on how to eliminate peak tailing?
thanks


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Anonymous on Thursday, June 10, 2004 - 12:56 am:

1.You need reinstall the column, more tailing peak for the early eluting peaks always due to column poor installation.
2. decrease the sample volume by increasing the split ratio or you can try to decrease the initial column temperature.

rgds
omar


Top of pagePrevious messageNext messageBottom of pageLink to this message  By PPG on Thursday, June 10, 2004 - 08:11 am:

Anyway it is an injection problem.
I agree with omar your column may be cut when you installed it inside the injector, or is not cut in a good way


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