TABLE 3.
Numbers of peaks detected in untargeted and targeted analyses.
| Air method blank (AMB) | ePen2NF | ePen2GT | ePen2CM | ePen2DC | |
|---|---|---|---|---|---|
| A. Detected compounds in untargeted scan | 22 | 72 | 91 | 99 | 131 |
| B1. Number of duplicate peaks | 0 | 4 | 2 | 5 | 3 |
| B2. Detected compounds after subtraction of duplicates | 22 | 68 | 89 | 94 | 128 |
| C. Compounds in AMB also present at comparable levels to analysed ePen aerosol scan | - | 1 | 0 | 3 | 1 |
| D. Number of untargeted compounds generated exclusively by e-cigarette | - | 67 | 89 | 91 | 127 |
| E. Number of detected targeted analysis peaks (for the ePen samples only those > AMB were counted) | 22 | n/a | 13 | 22 | 23 |
| F. Compounds identified in both untargeted (D) and targeted analyses (E) | 1 | n/a | 8 | 12 | 11 |
| G. Compounds uniquely identified in targeted analyses | 21 | n/a (5–12) a | 5 | 10 | 12 |
| H. Total peaks detected (D + G) | 43 | >67 (72–79) | 94 | 101 | 139 |
a
Figure in parenthesis is an estimate for the number of compounds in the targeted scan of the unflavored e-cigarette aerosol; the estimate used was the range of targeted analytes detected with the flavored e-cigarettes.