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  1. Whole Tobacco Alkaloid E-liquid

    by , 11-26-2009 at 10:18 PM
    I'm not content with theory, never have been, never will be. I prefer practice. Theory is suggesting possible answers to questions, practice is testing the theories and either proving or disproving them.

    E-liquid, in the traditional sense (if indeed vaping is long-established enough to have "traditions"), is essentially a mixture of propylene glycol and nicotine, with possibly VG and flavoring added.

    Whole tobacco alkaloid e-liquid is different. It does not ...

    Updated 01-29-2010 at 04:52 AM by DVap

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  2. It's not just the nicotine...

    by , 11-11-2009 at 06:47 AM
    Why do we smoke? Why do some of us not find vaping satisfying?

    As the dominant tobacco alkaloid at perhaps 90% (edit: or even 95%) by weight in the tobacco alkaloid spread, nicotine gets all the attention, with the other 5-10% by weight of tobacco alkaloids being largely ignored.

    It is not nicotine that hooks us, it is nicotine plus the all the other tobacco alkaloids. For many, nicotine e-liquid is unsatisfying. These folks vape high concentrations chasing what no amount ...

    Updated 02-03-2010 at 10:49 PM by DVap

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  3. Everything I think I know about vaping vs analogs

    by , 11-03-2009 at 11:55 PM
    Ecigs deliver the nicotine, plain and simple. The ability of ecigs to make ultralight and light smokers develop symptoms of nicotine overdose offers compelling evidence.

    I've mentioned it before, but when comparing nicotine blood levels (nicotine has a short half-life of 2 hours) and cotinine blood levels (much longer half-life for cotinine around 20 hours), the peak blood nicotine level is over-emphasized since it drops rapidly.

    What this means is that while nicotine level ...

    Updated 12-01-2009 at 07:48 AM by DVap

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  4. What's a scientist to do?

    by , 10-28-2009 at 01:04 AM
    Conflicting data makes a scientist crazy.

    On one hand, some studies have suggested that uptake of nicotine from vaping might be as low as 10%.

    On the other hand, I've produced data myself that shows an efficiency of around 40% in getting nicotine from the cart to the vapor.

    In order to square my results with the studies, then a 25% efficiency from vapor to body would be required (for every 1 mg vaped, 0.4 mg makes it to the vapor, and for every 0.4 mg in the ...

    Updated 01-29-2010 at 04:25 AM by DVap

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  5. Nicotine Determination

    by , 10-09-2009 at 04:23 AM
    I wanted to update anybody who might be interested in having me do a nicotine determination on their e-liquid.

    Awhile ago, I posted on the nicotine determination thread that I'd test e-liquid samples for anyone who might want to send me their liquid. The response was good, and I've been able to test numerous samples and have found that the procedure works very well and gives accurate results. I appreciate everyone who has helped me to put my procedure to the test by submitting their ...
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