I suggest for a better result you should use a headspace for your analysis.
When you use a "normal" GC I suggest you use a Split Liner 20782-216,5 4mm * 6,3 * 78,5. From Company Restek.
Its the only part I found which isn't from Agilent.
As Column I would use CP 7713 CP Wax 52CB. This one is from Agilent
I will mark this as assumed answered due to age, if this is not the case , please feel free to post again .