Analyte | Day | Spiked concentration (μg/g) | Mean concentration (n = 6) (μg/g) | RSD (%) | Overall mean concentration (μg/g) | Overall RSD (%) |
---|---|---|---|---|---|---|
Pb | 1 | 2.50 | 2.26 | 7.40 | 2.26 | 4.90 |
2 | 2.50 | 2.27 | 3.21 | |||
3 | 2.50 | 2.26 | 3.82 | |||
1 | 5.00 | 4.60 | 9.73 | 4.59 | 7.46 | |
2 | 5.00 | 4.59 | 7.06 | |||
3 | 5.00 | 4.59 | 4.50 | |||
1 | 7.50 | 7.10 | 6.46 | 7.20 | 5.89 | |
2 | 7.50 | 7.16 | 8.24 | |||
3 | 7.50 | 7.33 | 1.50 | |||
Cd | 1 | 0.50 | 0.52 | 7.51 | 0.51 | 9.12 |
2 | 0.50 | 0.53 | 9.41 | |||
3 | 0.50 | 0.49 | 9.06 | |||
1 | 1.00 | 1.04 | 5.61 | 1.06 | 6.03 | |
2 | 1.00 | 1.06 | 6.75 | |||
3 | 1.00 | 1.09 | 5.66 | |||
1 | 1.50 | 1.55 | 8.51 | 1.54 | 5.98 | |
2 | 1.50 | 1.55 | 6.24 | |||
3 | 1.50 | 1.53 | 4.41 | |||
Cr | 1 | 2.50 | 2.28 | 9.63 | 2.28 | 9.60 |
2 | 2.50 | 2.32 | 9.01 | |||
3 | 2.50 | 2.25 | 8.13 | |||
1 | 5.00 | 4.25 | 6.18 | 4.48 | 7.18 | |
2 | 5.00 | 4.62 | 7.91 | |||
3 | 5.00 | 4.57 | 4.79 | |||
1 | 7.50 | 6.35 | 2.86 | 6.55 | 8.16 | |
2 | 7.50 | 6.36 | 1.98 | |||
3 | 7.50 | 6.94 | 9.49 |