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Polycyclic aromatic hydrocarbons in smokeless tobacco products
Date:10/24/2013

tyles. Substantially higher levels of total PAHs (10-60 fold) were found in moist and dry snuff and soft pellets than in the other STPs.

To establish the sources of PAHs in STPs, the researchers looked at ratios of different PAHs, which have previously been shown in a number of environmental and food matrices to differ according to source. Analysis confirmed that the use of fire-cured tobaccos in the snuffs and soft pellet were the major source of PAHs in these products suggesting this method can be used as a diagnostic tool to identify the source of PAHs in STPs.

Analysis also indicated, for the first time, a variety of contributors to the trace levels of PAHs in snus and other STPs. For example, lower temperature petrol-based sources (such as car exhaust fumes) and higher temperature combustion sources (such as agricultural or wood fires) appeared to be important contributors to PAHs in snus. The researchers note that such environmental pollution could be difficult to avoid.

'Data from this research will help scientists and regulators understand the diversity of tobacco products and the substantial differences in toxicant levels between these STP categories,' says Kevin McAdam, lead author of the study and Principal Scientist at British American Tobacco. 'Moreover, the use of the diagnostic analysis of PAH ratios represents a valuable tool for understanding where PAH contamination of STPs arises'.

Additionally, the study identified strong correlations between B[a]P and all the other PAHs except the naphthalenes. As there are well established methods for determining B[a]P in tobacco, this finding suggests that B[a]P could be used as a good surrogate marker for many PAHs in STPs.


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Contact: Dr Marina Murphy
marina_murphy@bat.com
44-077-111-50135
R&D at British American Tobacco
Source:Eurekalert

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