Element | Concentration of metal added (spiked) (mg/g) | Concentration of metal in the original sample (unspiked) (mg/g) | Concentration of metal in the spiked sample (mg/g) | Recovered concentrations (mg/g) | % Recovery |
Pb
Mean ± SD | 1 1 1
| 0.430 0.432 0.426
| 1.428 1.432 1.420
| 0.998 1.000 0.994
| 99.8 100 99.4 99.73 ± 2.177 |
As
Mean ± SD | 1 1 1
| 0.331 0.326 0.329
| 1.231 1.216 1.360
| 0.900 0.890 1.031
| 90 89 103.1 103.1 ± 7.87 |
Cd
Mean ± SD | 1 1 1
| 0.586 0.604 0.589
| 1.591 1.584 1.609
| 1.005 0.980 1.020
| 100.5 98 102 100.17 ± 2.02 |
Cr
Mean ± SD | 1 1 1
| 0.312 0.309 0.310
| 1.312 1.289 1.348
| 1.000 0.980 1.038
| 100 98 103.8 100.6 ± 2.95 |
Hg
Mean ± SD | 2 2 2 | 0.374 0.403 0.385 | 2.174 2.533 2.085 | 1.800 2.130 1.700 | 90 106.5 85 93.83 ± 11.25 |
Ni
Mean ± SD | 2 2 2 | 0.019 0.015 0.019 | 2.019 1.995 1.986 | 2.000 1.980 1.967 | 100 99 98.4 99.13 ± 0.808 |
V
Mean ± SD | 2 2 2 | 0.063 0.057 0.069 | 1.967 1.850 2.094 | 1.904 1.793 2.025 | 95.20 89.65 101.25 95.4 ± 5.803 |
Cu
Mean ± SD | 2 2 2 | 0.134 0.133 0.130 | 2.185 1.958 2.234 | 2.051 1.825 2.104 | 102.55 91.25 105.20 99.7 ± 7.39 |