171 



Addition of PEI to Boost Nicotine 



' A 1967 study by the British- American Tobacco Company, 

 "Relation between 'Extractable Nicotine' Content of Smoke 

 and Panel Response," tested the effect of adding PEI 

 (polyethyleneimine) to cigarette fihers. 



' The study found that "treatment of a filter with 

 polyethleneimine (PEI) increases the delivery of 

 'extractable nicotine.' " [BW-W2-11807] 



' Table 1 in the report showed a nearly 300% increase in 

 nicotine deliveries by adding 5.4% PEI: 



Nicotine Deliveries 



(expressed as mg per cigarette) 



[BW-W2-U808) 



Horschst Celanese filed a patent apphcation in 1988 (pat. 

 no.5,009,239) to by adding PEI to cigarette filters. According 

 to the patent, the purpose of the patent is to "improv[e] ... 

 selective nicotine pass through properties of a cigarette 

 filter." 



