Table 1 Trace metal concentrations in certified reference material (DORM-3) as well as accuracy and detection limits determined by ICP-MS analyses
Element | DORM-3 values | DORM-3 analyzed | Accuracy | Detection limit | Detection limit (mg/kg) |
|---|---|---|---|---|---|
± SD (mg/kg) | ± SD (mg/kg) | (%) | (μg/L) | for 200 mg (FW) sample | |
As | 6.88 ± 0.30 | 6.30 ± 0.40 | 92% | 0.008 | 0.001 |
Cd | 0.290 ± 0.020 | 0.27 ± 0.02 | 94% | 0.01 | 0.001 |
Co | n.c. | - | - | 0.009 | 0.001 |
Cu | 15.5 ± 0.63 | 16.35 ± 0.93 | 105% | 0.19 | 0.078 |
Fe | 347 ± 20 | 346.95 ± 28.24 | 100% | 2.76 | 0.354 |
Mn | n.c. | - | - | 0.1 | 0.251 |
Pb | 0.395 ± 0.050 | 0.417 ± 0.043 | 106% | 0.26 | 0.003 |
Se | n.c | - | - | 0.14 | 0.008 |
Sn | 0.066 ± 0.012 | 0.0067 ± 0.010 | 102% | 0.01 | 0.005 |
V | n.c. | - | - | 0.01 | 0.002 |
Zn | 51.3 ± 3.1 | 44.4 ± 3.2 | 87% | 2.77 | 0.161 |