However every company that analyzes their own product will always put their best foot forward, its only natural.
I just now had a moment to investigate. So, Chemnovatic is a very respectable nicotine manufacturer and distributor located in Lublin, Poland: Dobrzanskiego 3/BS002, 20-262 Lublin.
The report I linked above (Physical and chemical assessment of 1,3 Propanediol as a potential substitute of propylene glycol in refill liquid for electronic cigarettes) is authored by:
and doesn't seem to have any connection to Chemnovatic or its products--at least I can't find it anywhere. Why do you think it's authored by Chemnovatic? What am I missing?