Table 3 Recovery percentages and concentrations of As, Cd, Pb, Ni, Zn, and Fe in SRM (1515)
Analyte | SRM conc. μg/g (±SD) | Measured conc. μg/g (±SD) | Recovery (%) |
|---|---|---|---|
As | 0.038 (±0.007) | 0.039 (±0.002) | 102 |
Cd | 0.013 (±0.002) | 0.012 (±0.009) | 96 |
Pb | 0.47 (±0.02) | 0.5 (±0.02) | 106 |
Ni | 0.91 (±0.12) | 0.86 (±0.004) | 94.5 |
Zn | 12.5 (±0.3) | 13.5 (±0.3) | 108 |
Fe | 83 (±5) | 83.3 (±4) | 100 |