Table 1.

Characteristics of research cigarettes

Research cigarettes nominal nicotine content
12 mg8 mg4 mg2 mg1 mg
Measured nicotine content, mg10.
Tobacco weight, mg636636615626650
FTC method
Nicotine, mg0.
Tar, mg11.
Carbon monoxide, mg11.411.510.110.311.9
NNK, ng49.341.442.926.129.6
NNN, ng109.779.5127.759.952.6

NOTE: Machine testing of research cigarettes using standard U.S. Federal Trade Commission procedures were conducted by the U.S. Centers for Disease Control and Prevention.

Abbreviations: FTC, Federal Trade Commission; NNN, N′-nitrosonornicotine.