Methods for forming aerosol-generating substrates having a reduced amount of tobacco specific nitrosamines

Abstract

There is provided a method of forming an aerosol-generating substrate, the method including providing a liquid nicotine source containing at least one tobacco-specific nitrosamine; mixing the liquid nicotine source with a solvent and at least one aerosol former to form an aerosol-generating substrate; and irradiating the aerosol-generating substrate with ultraviolet light to reduce an amount of the at least one tobacco-specific nitrosamine. Also provided is a method of forming an aerosol-generating substrate, the method including providing a tobacco slurry containing at least one tobacco-specific nitrosamine; irradiating the tobacco slurry with ultraviolet light to reduce an amount of the at least one tobacco-specific nitrosamine; and drying the tobacco slurry to form an aerosol-generating substrate.

1 .- 14 . (canceled) 
     
     
         15 . A method for reducing an amount of at least one tobacco-specific nitrosamine in an aerosol-generating substrate, the method comprising:
 providing a tobacco slurry containing the at least one tobacco-specific nitrosamine;   irradiating the tobacco slurry with ultraviolet light; and   drying the tobacco slurry to form the aerosol-generating substrate.   
     
     
         16 . The method according to  claim 15 , further comprising casting the tobacco slurry before the drying of the tobacco slurry, wherein the casting the tobacco slurry is performed before or after the irradiating of the tobacco slurry. 
     
     
         17 . The method according to  claim 15 , wherein the ultraviolet light irradiance of the tobacco slurry is at least 4 milliwatts per square centimeter. 
     
     
         18 . The method according to  claim 15 , wherein the tobacco slurry is irradiated with the ultraviolet light for less than 60 minutes. 
     
     
         19 . The method according to  claim 15 , wherein the ultraviolet light has a peak intensity at a wavelength of between 315 nanometers and 400 nanometers. 
     
     
         20 . The method according to  claim 15 , wherein the ultraviolet light has a peak intensity at a wavelength of between 350 nanometers and 380 nanometers.