Getting close to an answer

I'm getting really close to being able to answer the question, "If you vape an e-liquid at x mg/mL nicotine, how much of the nicotine actually gets into the vapor you inhale?"

I should take a moment to thank RenaissancePuffer for a comment he made on the nicotine determination thread that made my brain go "click!" thus leading me to the testing procedure I'm currently working on... cryogenic trapping of the vapor. It's going to save me a lot of work and provide a much more reliable result than the idea I had been working with.

I made my first test run of the cryogenic trapping procedure earlier this evening, and of course, I'd overlooked something. Seems that vaping through a tube inserted into liquid nitrogen causes a slush of liquified nitrogen and oxygen to form in the tube, and when they evaporate on removal from the liquid nitrogen bath, they blow out the ends of the tube and take some of the collected vapor with them... not good.

My next test will use liquid argon instead, not quite so cold as liquid nitrogen, so it should eliminate the slushing and subsequent boiling out of the slush in the collection tube. I'm hoping this next test will be the one that gives me the result I can stand behind.