Table 1.
Validation of the trace elemental analysis by ICP-MS using standard reference materials (SRM) NIST SRM1640a—Trace Elements in Natural Water and INCT-PVTL-6 (Polish Virginia Tobacco Leaves, Institute of Nuclear Chemistry and Technology)
| (SRM) 1640a—Trace Elements in Natural Water | |||||
| Element | Certified value(μg/L)a | Repeatability (n = 6) | Reproducibility (n = 3) | ||
| Calculated valueb (μg/L) | RSD (%)c | Calculated valueb (μg/L) | RSD (%) | ||
| Al | 52.6 ± 1.8 | 54.4 ± 0.5 | 0.9 | 53.8 ± 3.5 | 6.5 |
| V | 14.93 ± 0.21 | 14.0 ± 0.1 | 0.4 | 14.1 ± 0.2 | 1.4 |
| Cr | 40.22 ± 0.28 | 37.9 ± 0.1 | 0.3 | 38.3 ± 0.7 | 1.8 |
| Mn | 40.07 ± 0.35 | 38.6 ± 0.3 | 0.7 | 36.8 ± 1.6 | 4.3 |
| Fe | 36.5 ± 1.7 | 37.1 ± 0.2 | 0.5 | 36.5 ± 0.9 | 2.3 |
| Ni | 25.12 ± 0.12 | 23.9 ± 0.1 | 0.4 | 24.5 ± 0.6 | 2.4 |
| Co | 20.08 ± 0.24 | 19.1 ± 0.1 | 0.4 | 19.3 ± 1.0 | 5.2 |
| Cu | 85.07 ± 0.48 | 85.1 ± 0.8 | 1.0 | 85.0 ± 0.3 | 0.3 |
| Zn | 55.20 ± 0.32 | 53.8 ± 0.3 | 0.5 | 54.6 ± 4.9 | 9.0 |
| As | 8.010 ± 0.067 | 7.44 ± 0.03 | 0.4 | 7.40 ± 0.20 | 2.7 |
| Se | 19.97 ± 0.16 | 18.6 ± 0.1 | 0.5 | 19.6 ± 1.0 | 5.2 |
| Mo | 45.24 ± 0.59 | 43.0 ± 0.3 | 0.7 | 43.5 ± 1.1 | 2.4 |
| Cd | 3.961 ± 0.072 | 3.99 ± 0.04 | 1.0 | 3.86 ± 0.24 | 6.2 |
| Sb | 5.064 ± 0.045 | 5.05 ± 0.06 | 1.2 | 5.38 ± 0.33 | 6.1 |
| Pb | 12.005 ± 0.040 | 11.2 ± 0.1 | 1.1 | 10.7 ± 0.4 | 4.2 |
| U | 25.15 ± 0.26 | 25.4 ± 0.3 | 1.0 | 24.0 ± 1.3 | 5.3 |
| INCT-PVTL-6 (Polish Virginia Tobacco Leaves) | |||||
| Element | Certified valueb (μg/kg d.w.) | Calculated valueb (μg/kg d.w.) | RSD (%) | Calculated valueb (μg/kg d.w.) | RSD (%) |
| Mo | 396 ± 29 | 375 ± 4 | 1.0 | 381 ± 16 | 4.3 |
RSD relative standard deviation
aMean ± 2σ, where σ is the SE
bMean ± SD