Table 1.
Retention times (Rt) of the 11 “dry puff markers” (using WHO TobLabNet SOP08 [36].) and the highest amounts measured for liquid/coil/power settings combinations categorized as “no dry puff flavor” based on the results of the human assessors (“cutoff values”). Peaks corresponding to these compounds were identified in the chromatographic data by matching the retention time listed here to the retention time of peaks in the chromatogram. The concentration of each compounds was taken to be proportional to its peak surface area. Quantities in µg were derived from the surface areas using formaldehyde-DNPH as a standard.
| Compound | Rt 1 (min) | Cutoff Values (µg/puff) |
|---|---|---|
| peak1 | 4.29 | 1.2 |
| lactaldehyde-DNPH 2 | 5.64 | 0.8 |
| peak2 | 7.01 | 0.3 |
| formaldehyde-DNPH | 8.78 | 6.5 |
| peak3 | 10.05 | 0.3 |
| Acetaldehyde-DNPH (isomer 1) | 11.78 | 6.7 |
| Acetaldehyde-DNPH (isomer 2) | 12.52 | |
| acrolein-DNPH | 16.68 | 0.4 |
| peak4 | 17.85 | 0.2 |
| peak5 | 21.21 | 1.9 |
| peak6 | 22.36 | 1.4 |
| peak7 | 23.50 | 0.2 |
1 Rt—retention time; 2 DNPH—dinitrophenyl hydrazine.