Figure 1From: Polycyclic aromatic hydrocarbons in US and Swedish smokeless tobacco productsExamples of chromatograms. A: Total ion chromatogram for Timberwolf Straight Long Cut. B: Same chromatogram on an expanded scale. C: Expanded chromatograms for m/z 128 (naphthalene) and m/z 136 (d8-naphthalene).Back to article page