Nicotine shelf life and other matters.

[Alien Traveler]

In the refrigerator no loss in mg strength over 4 months is very good. But no information on actual oxidation amounts over time (Tanning). They just kind of lumped MG loss and oxidation into one category. This was also tested at 35mg. I think the standard should be 100mg as the higher the mg the faster it oxidizes.

It looks counterintuitive.
Amount of oxidation is determined (I believe) by amount of oxygen which have found its way into solution. And it does not depend on concentration of nicotine. In the same bottle in the same conditions the same amount of oxygen will enter the liquid. It will oxidize the same amount of nicotine. But in stronger solution we have more nicotine, and proportion of oxidized nicotine will be lower. So, it looks like lower concentration of nicotine are more prone to oxidation.

 

[zoiDman]

Does Nicotine Oxidation only occur by Free O2 in air?

 

[mhertz]

... By both O2 in 'air'(headspace in bottle and with cap off), but also with allready disolved O2 in vg/pg, which there always is...

 

[dannyv45]

Does Nicotine Oxidation only occur by Free O2 in air?

Oxidation is caused by the introduction of heat, light, air and water (Moisture, condensation).

 

[zoiDman]

Oxidation is caused by the introduction of heat, light, air and water (Moisture, condensation).

Perhaps a Better Question I should have asked is...

At Room Temperature, with No Light and No Oxygen in the Headspace of a Container, can Nicotine Oxidize if it is in a PG or VG or PG/VG Solution?

 

[mhertz]

Yes, as I previously posted, then there will always be disolved O2 in vg and pg. That's why e.g. freezing is a nice thing not only because of the coldness but also the fact that the liquid thickens(greatly with unthinned vg), which means that the disolved O2 and nic molecules will not as easilly meet eachother and react i.e. oxidice.