Table 4.
Concentration of macro- and trace elements in the reference material.
| Macro- and Trace Elements | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Parameter | Ca | Mg | K | Na | Zn | Cu | Fe | Mn | Cr |
| Theoretical value (mg/kg) | 3522 | 752.3 | 10,260 | 6300 | 24 | 2.94 | 22.9 | 9.02 | 0.15 |
| Found value [mg/kg] | 3452 | 808 | 11,191 | 5743 | 25.7 | 3.55 | 19.7 | 10.6 | 0.15 |
| 3609 | 808 | 12,105 | 5969 | 25.8 | 3.30 | 21.1 | 9.36 | 0.14 | |
| 3181 | 725 | 10,184 | 4965 | 22.9 | 3.41 | 21.1 | 9.75 | 0.14 | |
| 3625 | 731 | 11,441 | 6181 | 24.1 | 3.41 | 20.8 | 9.86 | 0.16 | |
| 3741 | 703 | 12,043 | 5281 | 22.8 | 3.47 | 21.8 | 9.54 | 0.17 | |
| 3618 | 765 | 11,673 | 5917 | 24.2 | 3.39 | 24.1 | 10.4 | 0.17 | |
| Average | 3538 | 756.7 | 11,440 | 5676 | 24.3 | 3.42 | 21.4 | 9.93 | 0.16 |
| SD | 197.5 | 44.5 | 707.1 | 461.5 | 1.29 | 0.0861 | 1.46 | 0.50 | 0.01 |
| RSD (%) | 5.58 | 5.88 | 6.18 | 8.13 | 5.30 | 2.51 | 6.79 | 5.00 | 6.25 |
| Recovery (%) | 100.5 | 100.6 | 111.5 | 90.1 | 101.0 | 116.4 | 93.6 | 110.1 | 107 |
| LOD (µg/kg) | 180 | 30 | 60 | 78 | 41 | 187 | 154 | 174 | 0.57 |
| LOQ (µg/kg) | 600 | 110 | 250 | 281 | 152 | 655 | 513 | 618 | 2.20 |