Table 1.
Analytical results obtained for Certified Reference Material (CRM) samples along with per cent recovery.
| Trace metals | Reference # 7502-a (White rice powder) | JSd-1 (Stream sediment) | ||||
|---|---|---|---|---|---|---|
| Certified value (µg g-1) | Observed value (µg g-1) | Recovery (%) | Certified value (µg g-1) | Observed value (µg g-1) | Recovery (%) | |
| Cu | 3.02 | 3.08 ± 0.060 | 102.0 | 22.00 | 22.62 ± 1.21 | 102.8 |
| Zn | 26.00 | 24.62 ± 0.041 | 94.7 | 96.50 | 104.22 ± 0.48 | 108.0 |
| Ni | 0.39 | 0.414 ± 0.008 | 106.0 | 7.04 | 7.66 ± 0.10 | 108.8 |
| Fe | 4.48 | 4.93 ± 0.071 | 110.0 | – | 20,010 ± 511 | – |
| Mn | 11.20 | 10.18 ± 0.085 | 90.9 | – | 488.9 ± 2.24 | – |
| Pb | 0.0043 | bdl (< 0.01) | – | 12.90 | 13.80 ± 4.38 | 107.0 |
| Cr | 0.075 | 0.084 ± 0.036 | 112.0 | 21.50 | 20.36 ± 1.22 | 94.7 |
| Cd | 0.548 | 0.522 ± 0.18 | 95.3 | 0.146 | 0.134 ± 0.08 | 91.8 |
bdl below detectable limit.