Barn type/fuel | Burner configuration | Period when this curing process was widespread | Number of samples | TSNA in tobacco (ppm) |
---|---|---|---|---|
Stick/wood | Flues | 1970s and earlier | 6 | 0.3 |
Bulk/diesel | Heat exchange | 21st century | 27 | 1.0 |
Bulk/LPG (Turkey) | Heat exchange | 21st century | 23 | ND |
Stick/LPG | Direct fired | 1970s to 1980s | 1 | 5.9 |
Bulk/LPG | Direct fired | 1980s to 1990s | 43 | 11.0 |
This tableĀ is adapted from table 3 in Exhibit 40368.14
LPG, Liquefied petroleum gas; ND, not detected; ppm, parts per million; TSNA, tobacco-specific nitrosamines.