Table 3.
A summary of PLSR calibration and validation results for the quantification of aflatoxins obtained by NIR and MIR spectroscopy
| Chemo-metrics | r c | RMSECV (μg/kg) | r v | RMSEP (μg/kg) | RPD | Factors | Validation sets | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Slope | Intercept | Bias (μg/kg) | ||||||||
| AFB1 | NIR | 0.981 | 105.0 | 0.973 | 70.4 | 4.0 | 10 | 1.010 | 21.98 | 24.786 |
| MIR | 0.980 | 100.0 | 0.970 | 70.8 | 4.0 | 8 | 0.931 | 39.75 | 21.368 | |
| AFB2 | NIR | 0.958 | 6.4 | 0.969 | 4.7 | 3.3 | 8 | 1.080 | 0.74 | 1.930 |
| MIR | 0.982 | 5.9 | 0.965 | 4.7 | 3.3 | 8 | 1.029 | 1.50 | 16.668 | |
| AFG1 | NIR | 0.941 | 180.0 | 0.936 | 144.0 | 2.8 | 8 | 0.934 | 54.01 | 29.642 |
| MIR | 0.932 | 198.0 | 0.922 | 155.0 | 2.6 | 5 | 0.816 | 83.26 | 14.709 | |
| AFG2 | NIR | 0.939 | 13.1 | 0.945 | 9.8 | 2.5 | 8 | 1.077 | 1.61 | 3.449 |
| MIR | 0.909 | 14.2 | 0.932 | 9.9 | 2.5 | 4 | 0.954 | 5.09 | 4.024 | |
| AFs | NIR | 0.950 | 299.0 | 0.951 | 231.0 | 3.1 | 8 | 0.967 | 77.53 | 55.720 |
| MIR | 0.975 | 302.0 | 0.948 | 232.0 | 3.1 | 8 | 0.915 | 111.00 | 54.190 | |