Table 4.
Concentration of copper (Cu) in µg/g of e-liquid for the purchased cigalike ENDS cartridges.
| Product | Flavor | Purchases | ||||
|---|---|---|---|---|---|---|
| Copper µg/g | ||||||
| 1 | 2 | 3 | 4 | Average | ||
| blu | Classic Tobacco | 69 (1)a,b | 6.2 (0.4) | 92 (0.1) | 120 (9) | 71 (40) |
| Carolina Bold | 1.3 (0.1) | 8.0 (0.6) | 30 (0.6) | N/Ac | 13 (10) | |
| Magnificent Menthol | 120 (10) | 59 (2) | 23 (0.3) | 180 (20) | 100 (70) | |
| Cherry Crush | 33 (0.5) | N/A | 1.9 (0.03) | 47 (7) | 27 (20) | |
| MarkTen | Classic | 0.50 (0.00) | 0.66 (0.02) | 0.41 (*) | 0.37 (0.01) | 0.51 (0.12) |
| Menthol | 0.66 (0.05) | BLQd | BLQ | BLQ | 0.66 (0.05) | |
| Summer Fusion | BLQ | BLQ | 0.32 (*) | BLQ | 0.32 (*) | |
| Winter Mint | BLQ | BLQ | BLQ | BLQ | UTDe | |
| Vuse Solo | Original | BLQ | BLQ | 61 (20) | 5.9 (0.9) | 34 (30) |
| Menthol | BLQ | 43 (8) | 15 (3) | 12 (5) | 23 (20) | |
| Mint | BLQ | BLQ | BLQ | N/A | UTD | |
| Berry | BLQ | BLQ | BLQ | BLQ | UTD | |
| Chai | BLQ | 0.56 (0.02) | BLQ | 0.45 (*) | 0.53 (0.06) | |
| Crema | BLQ | BLQ | BLQ | 66 (4) | 66 (4) | |
| Vuse Vibe | Original | BLQ | BLQ | BLQ | 0.94 (0.3) | 0.94 (0.3) |
| Menthol | N/A | BLQ | N/A | 29 (0.1) | 29 (0.1) | |
| Nectar | 0.58 (0.00) | BLQ | BLQ | 5.3 (0.8) | 2.9 (3) | |
| Melon | BLQ | BLQ | 3.6 (0.3) | 130 (100) | 78 (100) | |
| Blank | Propylene Glycol | BLQ | ||||
| Glycerol | 0.55 (*) | |||||
All samples for which the mean copper concentration is equal to or exceeds the USP limits for Cu (3 μg/g) are bolded.
aConcentrations are reported as mean (standard deviation), n = 3 unless otherwise noted by (*).
bBold indicates the mean metal concentration exceeded the USP limit for an inhaled product.
cN/A indicates the brand and flavor combination was unavailable during the purchase attempt.
dBelow lower limit of quantitation (BLQ).
eUnable to determine (UTD).