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

Figure 4

Effects of indirect addition of three nitrate compounds and sodium nitrite on TSNAs formation in flue-cured tobacco during warm temperature storage. Note. The 1 mol/L of nitrate, nitrite compounds (310 mg of and 230 mg of , resp.), and tobacco were added separately in the closed vessel which was then stored at 45°C for 15 d. Uppercase letters indicate significant differences between the treatments at .

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