Table 1 Constituents in whole tobacco (per cigarette)
ConstituentDomesticImported
Mean (SD)Brands below detection limitMean (SD)Brands below detection limit
Alkaloids
    Nicotine (mg/cig)12.6 (1.6)011.1 (2.2)**0
    Nornicotine (μg/cig)289.3 (67.1)0422.5 (98.4)***0
    Anabasine (μg/cig)67.1 (9.4)063.3 (6.5)1
    Anatabine (μg/cig)477.1 (64.1)0398.0 (93.4)***0
Metals
    Arsenic (ng/cig)151.4 (64.4)5169.2 (26.2)0
    Nickel (ng/cig)250.4 (100.2)0823.3 (121.9)***0
    Lead (ng/cig)257.7 (77.7)0257.0 (66.5)0
    Cadmium (ng/cig)929.7 (201.8)0765.8 (69.8)**0
    Chromium (ng/cig)353.3 (115.3)0581.4 (103.0)***0
    Selenium (ng/cig)236110.5 (–)11
    Mercury (ng/cig)26.8 (4.6)16912
Nitrosamines
    NNN (ng/cig)286.9 (118.3)141776.2 (817.2)***0
    NNK (ng/cig)448.5 (237.4)39437.2 (376.1)8
    NAT (ng/cig)378.8 (169.3)0992.1 (332.4)***0
    NAB (ng/cig)82.0 (5.3)232240.0 (–)***11
Other
    Benzo[a]pyrene (ng/cig)6.1 (8.6)05.7 (7.8)0
    Triacetine (ug/cig)23.1 (15.6)1136.3 (9.3)**1
    Nitrate (mg/cig)1.2 (0.6)05.9 (2.0)***0
    Ammonia (ug/cig)261.1 (90.3)01136.9 (613.8)***0
    Glycerol (mg/cig)13.2 (1.3)22313.5 (0.0)9
    Propylene glycol (mg/cig)1.7 (0.2)2074.7 (0.0)***9
  • Significance level: *p<0.05, **p<0.01, ***p<0.001.

  • NNN, N-nitrosonornicotine; NNK, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone; NAT, N-nitrosoanatabine; NAB, N-nitrosoanabasine.

  • Note that myosmine, sodium propionate, sorbic acid, eugenol and tri-ethylene glycol were below detectable limits for all brands.