Research Article
Levels of Heavy Metals in Popular Cigarette Brands and Exposure to These Metals via Smoking
Table 1
Results obtained for the standard reference materials together with certified value.
| SRM | Element | Certified value (μg g−1) | Measured value |
| Pine needles | Pb | 0.167 ± 0.013 | 0.161 ± 0.102 | NIST-SRM 1575a | Cd | 0.233 ± 0.009 | 0.214 ± 0.013 | Spinach leaves | Pb | 0.200 ± 0.006 | 0.198 ± 0.012 | NIST-SRM 1570 | Cd | 2.890 ± 0.070 | 2.830 ± 0.095 |
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