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- Posts: 1
- Joined: Wed May 02, 2018 10:26 am
I am currently trying to identify unknown products in neat glycerol and neat ethylene glycol samples.
I am looking for light molecular weight compounds such as polar aldehydes (formaldehyde) and as well as heavier compounds such as various length oligomers.
I have managed to run liquid sampling GCMS of neat ethylene glycol with a Zebron ZB-5 column which has worked successfully. (Phase: 5%-Diphenyl-95%-dimethylpolysiloxane copolymer)
However, when I run a liquid glycerol sample, I see a sharp rise in the baseline after the glycerol peak. (Showing significant bleed)
Is it because it is a viscosity issue? Or would it be that the column is not compatible with glycerol as a solvent? (And is destroying the stationary phase)
Is there a better column, method or technique of analysing my samples for unknown compounds?