Table 7.
Metal concentrations from 21st Century cartridges comparing older and newer samples (mean ± standard deviation, µg/g).
| 21st Century® | Cr | Ni | Cu | Zn | Cd | Sn | Pb |
|---|---|---|---|---|---|---|---|
|
Menthol Express
2.0% Nicotine 2 years old 2014 § |
<LRL | 0.755 ± 0.318 | 319 ± 13 | 113 ± 2 | <LRL | 0.365 ± 0.142 | 1.35 ± 0.28 |
|
Menthol Express
2.0% Nicotine 2016 |
<LRL | 0.363 ± 0.513 | <LRL | <LRL | <LRL | <LRL | <LRL |
|
Regular Express
2.0% Nicotine 2 years old 2014 § |
<LRL | 0.427 ± 0.058 | 205 ± 6 | 64.6 ± 1.9 | <LRL | 0.208 ± 0.164 | <LRL |
|
Regular Express
2.0% Nicotine 2016 |
0.033 ± 0.016 | 0.211 ± 0.068 | <LRL | <LRL | <LRL | <LRL | <LRL |
|
Regular Express
Zero Nicotine 2 years old 2014 |
<LRL | 0.452 ± 0.103 | 9.18 ± 0.73 | 12.5 ± 0.7 | <LRL | <LRL | 0.668 ± 0.015 |
|
Regular Express
Zero Nicotine 2016 |
<LRL | 0.746 ± 0.342 | <LRL | 13.5 ± 0.3 | <LRL | 0.262 ± 0.210 | 0.691 ± 0.020 |
§ Brass connectors were observed in these cartridges.