If you’re using a fairly polar column it’s possible. n-Propanol has a fairly exposed hydroxy group. On a DB-WAX column, it elutes after ethyl propionate (closest compound to ethyl butyrate I could find data for). Here’s a list of typical retention times for various phases.

https://www.chem-agilent.com/cimg/Solvent-Retention-Data_b-0292.pdf