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problem of column
Posted: Wed Jul 13, 2011 6:34 pm
by dalyborj
hi, I have a question regarding the analysis of LPG: I have a 50m capillary column. Al2plot. before each peak occurs at another peak. I tried to shorten the column injectors, but no results.
Re: problem of column
Posted: Wed Jul 13, 2011 11:22 pm
by chromatographer1
What makes you think the results are wrong?
Can you show a chromatogram?
best wishes,
Rod
Re: problem of column
Posted: Fri Jul 22, 2011 12:53 pm
by petroleum
It seems that some liquid is causing problem. we are facing the same problem. but we overcome this problem by certain modification.
1. Try to use microgasifire
if u cant use microgasifire then
2. change your injection technique
a. use tephlon tube for sample inlet and outlet so that you can observe that liquid is going inside or not.
b. Use some valve between GC and sample to control the flow rate before injection.(avoid overloading) always work with less flow .