I may be wrong but I'd like to share it.. it may be useless thou.. just my "beginner's own opinion"..
let's put aside all these nicotine inhaling calculations.. WHO still won't accept e-cig because they insist smokers doesn't have control over how much mg nicotine they're inhaling but that's just stupid.. You'll need to inhal ALOT nicotine INSTANTLY in order to reach the danger zone.. and e-cig producers are aware of it that's why the chip is there to cut it off when it's too much.. ok even consumers are able to mod it or using dip to have like 50mg+ nic (they must be dumb..).. It's still not producer's fault.. But I don't think WHO really do care about this.. what they're saying is simply "have not been properly tested by us, that's why we're not permitting it". Again they don't want to test it because they're scared of the result? if e-cig really did successfully gone through all the test.. then all the nic-gum and many other smoke-quitting products they've created will become total failure, and they won't be able to earn a penny because e-cig aren't their product unless they produse their own, aka starting from scratch.. but too bad they're late because other producers are long way ahead.
And one more thing we need to be sure and of course to TEST.. just to prove.. is "Does inhaling Propylene Glycol and all the other components you can find in the e-liquid harm your body".. I'm not smart nor do I know much about all these stuffs.. The only thing I know is Propylene Glycol is been used in many food ingrediences or whatsoever.. and FDA has recognized it as safe.. but still.. we're INHALING it.. not EATING it.. it 2 different things and it should be clear that whether it's safe or not for people to INHALE them.. and all the other stuffs.. As long we can prove all these things to WHO.. the only matter left is nicotine..
Again.. these stuffs are recognised as safe but inhaling is another matter.. because there are chemical reactions inside our body.. the lung may break them down and add stuffs and blabla.. who knows.. only chemicals know :x
/End
Hope this helps.. if not.. ignore
Bits from the reports re PG and human
May be more but I'm not a scientist so only skimming through.
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Propylene glycol C3H8O2 is a completely water soluble liquid, and is prepared by hydrolysis of propylene oxide under pressure at high temperature without a catalyst. It is used in pharmaceuticals, as a drug vehicle (for example as an FDA approved solvent for intravenous diazepam) and preservative. It is used also in personal lubricants. It is used in semi-moist pet food and as a humectant for tobacco. In the food industry it is used as a solvent, humectant and preservative. Its mist is used in theatrical stage productions.1 At low humidity, PG is a vapor; as dose and humidity increase it is held in the form of mist or fog, and at 100% humidity as in the lungs, it is dissolved.
Propylene glycol in humans
The toxicology website
http://toxnet.nlm.nih.gov/ was searched for PG, using terms such as human, aerosol, NOEL, carcinogenicity, inhalation. A review of PG has concluded it is safe for use in cosmetics at concentrations up to 50%.6
Absorption. PG vapor has 100% deposition efficiency in human airways.7
It is partly absorbed on inhalation. PG is absorbed completely from the gastrointestinal tract and partly and partly through the skin.
Metabolism. It is metabolized to lactic acid and pyruvic acid, and further oxidized to glycogen or carbon dioxide and water. In man, approximately 20-25% of the PG is eliminated unchanged via the kidney.
Inhalational safety in children. In a series of experiments to control airborne infections, over 105 children were subjected to bactericidal concentrations of propylene glycol in the wards of a children’s convalescent home in experiments conducted over 3 years.
Method. Six wards of the Children’s Seashore House in Atlanta containing 105 bedfast children aged 3 to 15 years were divided into 3 control and 3 undergoing vaporization for 3 week periods with 2 to 3 days between, before the control wards become vaporized, and the vaporized wards became controls. This rotation continued for 7 months. The PG was heated to vaporize it, but not above 80 degrees C, and vaporization continuously maintained a concentration of 0.069 mg per liter. (0.07 ppm)
Results. No ill effects were reported. In the first year, 100 infections occurred in control wards without PG, and 5 in wards with PG vaporization, with rates of 0.18 per week and 0.09 per week respectively. Most of the upper respiratory infections in control wards were common colds, suggesting the PG is also virucidal.8
Overall conclusion
Several toxicants in headspace of the Ruyan® e-cigarette cartridge have, on some tests, been found, specifically acrolein and acetaldehyde, at very low levels, and at levels below those determined to be harmful, and well below the minimum risk levels accepted by the US Public Health Service and OSHA.
The results obtained to date do not mitigate this report’s overall conclusion that the Ruyan® e-cigarette is designed to be a safe alternative to smoking, and appears to be safe in absolute terms on all measurements we have applied.
Direct tests of the safety of the e-cigarette mist are in their final stage.
18 October 2008
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As far as I can see the basics are fine - the only thing is what flavourings are added as it does not say what flavours have been tested. I think may be only tobacco flavours by the sound of it, although thinking about it there was a mention of coffee somewhere.
