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The accuracy of the method of determination of elements (mean ± SD)
| Element | Number of samples (n) |
Certified value (μg· g−1) |
Analytical value (μg· g−1) |
Method accuracy [% certified value] |
|---|---|---|---|---|
| Certified reference material Pig Kidney BCR No. 186 | ||||
| Ca | 6 | 295 ± 2 | 291.13 ± 7.46 | 98.7 |
| Mg | 6 | 830 ± 8 | 843.80 ± 11.25 | 101.7 |
| Fe | 6 | 299 ± 2 | 295.96 ± 11.53 | 99.0 |
| Zn | 6 | 128 ± 3 | 123.60 ± 1.52 | 96.6 |
| Cu | 6 | 31.9 ± 0.4 | 31.87 ± 0.20 | 99.9 |
| Virginia Tobacco Leaves CTA-VTL-2 | ||||
| Cr | 6 | 1.87 ± 0.16 | 1.81 ± 0.14 | 96.9 |
