I don't DYI myself but a thread I read quite often does refer to it often as well as has links in it to threads concerning just that aspect. The thread is now very long due to it's popularity with most of the info in it about commercially available NET
e-liquids from various vendors. The newer vendors currently seem to have cleaner
e-liquids less prone to clogging a coil than some of the older guard of suppliers. They are for the most part, if not all of them, using USDA certified ingredients as well as USP grade PG, VG and nicotine. They are not extracting their own nic... just their own
tobacco flavors directly from clean tobacco leaf sources. One of the vendors that tests their own extractions typically comes up will no more than having 1mg ( usually much less if any at all ) nicotine found in the extract itself and they stated they didn't think you'd ever see more then 2mg in a worst case scenerio.
The main thread I read often is
http://www.e-cigarette-forum.com/forum/general-e-liquid-discussion/274904-natural-tobaccos.html ... It has a lot of good info ( amongst the typical bs'ing of course ). Since I don't currently DIY my own extractions, I didn't save those links but they are listed in that huge thread somewhere. I do recall of those performing their own, most are sourcing their tobacco from standard tobacco shops locally or online and then soaking the leaves in PG and/or VG in a heat maceration type of method... then follow it up with several filterings to clean out any solids that may have soaked out.
After killing 2 ego-T atomizors, I figured it was time to call it quits.
