Nitrate and Nitrite Promote Formation of Tobacco-Specific Nitrosamines via Nitrogen Oxides Intermediates during Postcured Storage under Warm Temperature

Figure 6

Effect of indirect addition of nitrite and activated carbon (AC) on nitrogen oxides formation in a closed system with flue-cured tobacco. Note. (1) tobacco, (2) tobacco + NaNO₂, (3) tobacco + NaNO₂ + AC 2.0 g, and (4) tobacco + NaNO₂ + AC 10.0 g, 40 g of flue-cured tobacco, and 0.4 g NaNO₂ (266 mg of ). The , AC, and tobacco were added separately in vacuum desiccators stored at 45°C for 24 h. Uppercase letters indicate significant differences between the treatments at .

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