Scientists at British American Tobacco have used a multi-analyte approach to determine the level of exposure to tobacco constituents of snus users. The results show that, generally, less than a third of each constituent measured was extracted by consumers during use.
Snus is a moist snuff that is placed under the upper lip. Epidemiological evidence, particularly from Sweden, suggests that snus use is substantially less hazardous than cigarette smoking because it is not associated with increased risks of lung cancer, oral cancer and chronic obstructive pulmonary disease.
In this study, reported in Chemistry Central Journal (10.1186/1752-153X-7-55), the constituents tested included nicotine, four tobacco-specific nitrosamines (TSNAs), propylene glycol, water, ammonium, nitrate, sodium, chloride, linalool, citronellol, linalyl acetate and geraniol. The researchers found that, generally, less than a third of each constituent was extracted by consumers during use.
'As well as being the first detailed description of methodology for extracting and quantifying such a range of analytes, the findings from this study give us an idea of the real-life exposure of consumers to snus constituents,' says Nathan Gale, a researcher at British American Tobacco Group Research & Development.
A multi-analyte approach was used, which involves concurrently extracting various tobacco constituents from the same snus pouch using methanol, ethanol and water. The technique, which was validated by comparing the data obtained this way with data obtained from the corresponding established single-analyte methods, was applied to a pilot study of users of Swedish pouched snus. The levels of constituents in snus pouches were determined before and after one hour of use by participants previous research has shown that the median residence time in the mouth is one hour.
The UK Royal College of Physicians has concluded that different categories of smokeless t
|Contact: Dr Marina Murphy|
R&D at British American Tobacco