TABLE 1.
Occurrence of aflatoxins in selected maize samples.
| Sample | Mycotoxins (μ g kg –1) | |||||||
| AFB1 | AFB2 | AFG1 | AFG2 | AFM1 | AFM2 | AFL | ||
| ZM1 | Mean | 128 | 4 | <LOD | <LOD | 9 | 2 | <LOQ |
| SD | 2 | 1.1 | — | — | 1.7 | 0.8 | — | |
| ZM2 | Mean | 139 | 10 | <LOD | <LOD | 10 | 8 | <LOD |
| SD | 5.4 | 0.4 | — | — | 0.2 | 0.4 | — | |
| ZM3 | Mean | 63 | 7 | <LOD | <LOD | 6 | <LOD | <LOQ |
| SD | 1.3 | 0.5 | — | — | 0.8 | — | — | |
| ZM4 | Mean | 47 | 8 | 22 | <LOD | 2 | <LOD | <LOD |
| SD | 2.1 | 0.1 | 0.1 | — | 0.1 | — | — | |
| ZM5 | Mean | 28 | 1 | <LOD | <LOD | 2 | <LOD | <LOD |
| SD | 2.5 | 0.2 | — | — | 0.3 | — | — | |
| ZM6 | Mean | 28 | 2 | <LOD | <LOD | 2 | <LOD | <LOD |
| SD | 1.1 | 0.1 | — | — | 0.1 | — | — | |
| ZM7 | Mean | 24 | 5 | <LOD | <LOD | 3 | <LOD | <LOD |
| SD | 0.4 | 0 | — | — | 0.2 | — | — | |
| ZM8 | Mean | 23 | 5 | 12 | <LOD | 2 | <LOD | <LOD |
| SD | 2.3 | 0.8 | 0 | — | 0.3 | — | — | |
| ZM9 | Mean | 14 | <LOQ | <LOD | <LOD | 1 | <LOD | <LOD |
| SD | 1.8 | — | — | — | 0.4 | — | — | |
| ZM10 | Mean | 14 | <LOQ | <LOD | <LOD | 1 | <LOD | <LOD |
| SD | 3.7 | — | — | — | 0.3 | — | — | |
| ZM11 | Mean | 17 | <LOQ | <LOD | <LOD | 1 | <LOD | <LOD |
| SD | 1.9 | — | — | — | 0.2 | — | — | |
| ZM12 | Mean | 11 | <LOQ | <LOD | <LOD | 0.5 | <LOD | <LOD |
| SD | 1.8 | — | — | — | 0.2 | — | — | |
| ZM13 | Mean | <LOD | <LOD | <LOD | <LOD | <LOD | <LOD | <LOD |
| SD | — | — | — | — | — | — | — | |
| ZM14 | Mean | <LOD | <LOD | <LOD | <LOD | <LOD | <LOD | <LOD |
| SD | — | — | — | — | — | — | — | |
| ZM15 | Mean | <LOD | <LOD | <LOD | <LOD | <LOD | <LOD | <LOD |
| SD | — | — | — | — | — | — | — | |
LOD (limit of detection): AFB1 0.025 μg kg–1, AFB2 0.025 μg kg–1, AFG1 0.25 μg kg–1, AFG2 0.25 μg kg–1 and AFM1 0.05 μg kg–1. LOQ (limit of quantification): AFB2 0.25 μg kg–1. Data are reported as mean ± standard deviation of three replicates. Samples are listed according to an internal coding system.