Solution comprising nicotine in unprotonated form and protonated form
There is provided a nicotine solution, including a carrier; nicotine in unprotonated form and in protonated form; and one or more acids, wherein at least benzoic acid, levulinic acid or a mixture thereof is present; and wherein the total content of acid present in the solution is no greater than 0.6 mole equivalents based on the nicotine.
1. A cartomizer containing a nicotine solution and a heating element, the nicotine solution comprising:
(i) a carrier;
(ii) nicotine in unprotonated form and in protonated form, wherein nicotine is present in an amount of from 1.8 to 6 wt% based on the total weight of the solution; and
(iii) an acid selected from the group consisting of benzoic acid; and
wherein the total content of acid present in the solution is between 0.3 and 0.6 mole equivalents based on the nicotine.
2. The cartomizer according to claim 1 wherein the nicotine solution further comprises water.
3. The cartomizer according to claim 1 comprising nicotine in an amount of no greater than 2 wt% based on the total weight of the nicotine solution.
4. The cartomizer according to claim 1 wherein the carrier is a solvent.
5. The cartomizer according to claim 4 wherein the solvent is selected from glycerol, propylene glycol and mixtures thereof.