Smoking and Tobacco Control Monograph No. 7 
Figure 4 
Filtration of smoke constituents 
Viscose 
15-mm Single Filters 
Acetate 
Paper 
100 
I 75 
■D 
a 50 
c 
o 
25 
F C A P N 
Paper/Carbon 
F C A P N 
Compound 
Acetate/Carbon 
(e) 
F C A P N 
Bonded Carbon 
Acetate + Paper 
7.5- + 7.5-mm Dual Filters 
Acetate + Paper/Carbon Acetate I + Paper/Carbon 
F C A P N 
Acetate + Bonded Carbon 
(d) 
F C A P N 
Compound 
F C A P N 
Acetate -t- Acetate/Carbon Viscose + Bonded Carbon 
Compound 
Key: F = formaldehyde; C = hydrogen cyanide; A = acrolein; P = total phenols; N = nicotine. 
Source: Williamson et al., 1965. 
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