Comparison of As fractions obtained from UASE with that obtained by the CSE of FA/CRM (mg kg−1).
| Fraction | FA samples | GBW08401 | ||||
|---|---|---|---|---|---|---|
| Conventional | Ultrasound | Average recovery | Conventional | Ultrasound | Average recovery | |
| Mean/SD | Mean/SD | Mean/SD | Mean/SD | |||
| RSD | RSD | RSD | RSD | |||
| F1 | 2.82 ± 0.32 | 2.32 ± 0.20 | 82.3% | 4.55 ± 0.53 | 4.12 ± 0.52 | 90.5% |
| 11.3% | 8.6% | 11.6% | 12.6% | |||
| F2 | 9.04 ± 0.91 | 7.98 ± 0.82 | 88.3% | 4.41 ± 0.52 | 4.77 ± 0.43 | 108% |
| 10.1% | 10.3% | 11.8% | 9.0% | |||
| F3 | 22.6 ± 1.36 | 20.6 ± 1.63 | 90.9% | 3.43 ± 0.17 | 3.60 ± 0.25 | 105% |
| 6.0% | 7.9% | 5.0% | 6.9% | |||
| F4 | 0.83 ± 0.12 | 0.92 ± 0.11 | 111% | 0.14 ± 0.03 | 0.16 ± 0.03 | 114% |
| 14.5% | 12.0% | 21.4% | 18.8% | |||
| F5 | 3.42 ± 0.35 | 3.86 ± 0.37 | 113% | 1.86 ± 0.21 | 1.90 ± 0.24 | 102% |
| 10.2% | 9.6% | 11.3% | 12.6% | |||
| Total | 38.72 | 35.64 | 92.1% | 14.39 | 14.55 | 101% |