I am interested in determining whether I can identify MCTs, propylene glycol, vegetable glycerin, and polyethylene glycol on either my GC 6890 or Heracles Electronic Nose. I am not really looking to quantify.

What factors should I look into first?

My GC has Rxi 624 Sil MS column installed.

My E-Nose has DB-5 and DB-1701 columns.