Thanks for the responses! To be clear, I am interested in ZERO taste, not if it has a taste one may like or dislike. A few years ago this might be WL Ice or Premium Pure (might have that name wrong), or 2013 Alchem from NicVape. Now all I have experienced that is like this is VT Premium. Oxides and other alkaloids, even solvents in the worst cases, can impart a taste (ash tray, tobacco, musty, acrid, etc). I
personally like unflavored nic that gives a "bite" or "funk" taste, with stronger TH and pepper in the nose, and I also don't like "invisible" nics for my own vaping. But for this study, I want a nic that is ultra-clean.
@mhertz: An anhydrous assay for nicotine purity (also known as a Karl-Fischer assay, or non-aqueous assay) is a bit misleading when it comes to nicotine purity. This assay will titrate ALL alkaloids, not just nicotine, and will also include the amount of water in the free-base nic. But it is a commonly used method for nic purity, and is required for USP standards. Better and more informative would be GC-FID, or an assay that differentiates between nicotine and other alkaloids, and does not include water in the overall %. USP has to be minimum 99%-101% by Karl-Fischer, but I've seen some ultra-pure nics showing a bit lower when just nicotine is looked at with other GC methods, and they would clearly surpass USP standards.
I do not care what the source country is for this particular nic. I'm not after promoting US nics, I simply want to eliminate any chemical variables as much as at all possible.
Very interesting about XV and chemnovatic being either WL Ice or cleaned Ice. I always thought (but never verified) that Ice was simply Alchem rebranded by WL, and Alchem was doing the follow-up inert gas distillation to get that last bit of alkaloids out. Maybe Chemnovatic is doing that again to get even purer. Maybe Kevin would know. But Ice was a WL product, and is not available anymore.
Has Levy had alkaloid analysis done on his nic? Or has Kevin? I can contact Kevin, but I've never spoken with Levy (if he is still XV).