Table 5. Comparison of CTRFIA and HPLC methods for AFB1 in food and feed samples.
| Sample | No. | Result by HPLC (μg/kg) | Results by CTRFIA (μg/kg) | RSD(%) | Recover(%) | |||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | Mean | |||||
| Peanut | 1 | 5.2 | 4.7 | 5.4 | 5.3 | 5.1 | 7.4 | 98.7 |
| 2 | 1.2 | 1.0 | 1.0 | 1.1 | 1.0 | 5.6 | 86.1 | |
| 3 | 7.6 | 7.2 | 7.3 | 7.9 | 7.5 | 5.1 | 98.2 | |
| 4 | 15.5 | 15.5 | 17.1 | 16.9 | 16.5 | 5.3 | 106.5 | |
| 5 | 0.8 | 0.7 | 0.7 | 0.8 | 0.7 | 7.9 | 91.7 | |
| Corn | 1 | 0.6 | 0.7 | 0.6 | 0.6 | 0.6 | 9.1 | 105.6 |
| 2 | 1.1 | 1.0 | 1.1 | 1.0 | 1.0 | 5.6 | 93.9 | |
| 3 | 5.2 | 5.2 | 5.8 | 5.6 | 5.5 | 5.5 | 106.4 | |
| 4 | 9.1 | 9.6 | 9.0 | 9.5 | 9.4 | 3.4 | 102.9 | |
| 5 | 7.5 | 7.5 | 7.9 | 8.1 | 7.8 | 3.9 | 104.4 | |
| Soy sauce | 1 | n.d. | n.d. | n.d. | n.d. | n.d. | - | - |
| 2 | 0.7 | 0.7 | 0.6 | 0.7 | 0.7 | 8.7 | 95.2 | |
| 3 | 2.5 | 2.4 | 2.5 | 2.5 | 2.5 | 2.3 | 98.7 | |
| 4 | 3.8 | 3.8 | 3.4 | 3.8 | 3.7 | 6.3 | 96.5 | |
| 5 | 4.7 | 4.7 | 4.4 | 4.8 | 4.6 | 4.5 | 98.6 | |
| Vegetable oil | 1 | n.d. | n.d. | n.d. | n.d. | n.d. | - | - |
| 2 | 1.5 | 1.5 | 1.5 | 1.4 | 1.5 | 3.9 | 97.8 | |
| 3 | 5.4 | 5.0 | 5.3 | 5.5 | 5.3 | 4.8 | 97.5 | |
| 4 | 8.4 | 8.4 | 9.0 | 8.6 | 8.7 | 3.5 | 103.2 | |
| 5 | 12.2 | 12.0 | 13.4 | 12.3 | 12.6 | 5.9 | 103.0 | |
| Mouse feed | 1 | 8.8 | 9.0 | 9.1 | 8.8 | 9.0 | 1.7 | 101.9 |
| 2 | 5.9 | 5.9 | 6.2 | 6.0 | 6.0 | 2.5 | 102.3 | |
| 3 | 19.7 | 20.5 | 20.4 | 21.3 | 20.7 | 2.4 | 105.2 | |
| 4 | 25.4 | 26.3 | 26.1 | 24.5 | 25.6 | 3.8 | 100.9 | |
| 5 | 42.3 | 43.2 | 44.0 | 42.4 | 43.2 | 1.9 | 102.1 | |
n.d. is short for "not detected."