Table 6.
Near-infrared spectroscopy calibration parameters from the prediction set on the sum (µg/kg DM) and count (n) of fumonisins mycotoxin class 1.
| SUM of Fumonisins | ||||||
|---|---|---|---|---|---|---|
| Cut off 400 µg/kg DM | Cut off 700 µg/kg DM | Cut off 1000 µg/kg DM | ||||
| Class1 | Class2 | Class1 | Class2 | Class1 | Class2 | |
| Class1 | 13.5 ± 2.1 | 5.5 ± 2.1 | 27.1 ± 3.0 | 7.0 ± 3.0 | 34.8 ± 2.7 | 6.2 ± 2.7 |
| Class2 | 5.2 ± 2.2 | 11.8 ± 2.2 | 4.9 ± 2.5 | 26.1 ± 2.5 | 2.9 ± 2.3 | 34.1 ± 2.3 |
| Accuracy | 70.5 ± 7.3% | 81.8 ± 5.2% | 88.3 ± 4.3% | |||
| Sensitivity | 70.8 ± 11.1% | 79.6 ± 8.7% | 84.9 ± 6.6% | |||
| Specificity | 69.3 ± 12.8% | 84.3 ± 8.0% | 92.2 ±6.3% | |||
| CI 2 | (52.8 ± 7.6%), (84.0 ± 5.7%) | (70.44 ± 6.0%), (90.1 ± 3.9%) | (79.2 ± 5.2%), (94.3 ± 3.0%) | |||
| p value | 0.074 ± 0.121 | <0.05 | <0.05 | |||
| COUNT of Fumonisins | ||||||
| Cut off n = 4 | Cut off n = 5 | Cut off n = 6 | ||||
| Class1 | Class2 | Class1 | Class2 | Class1 | Class2 | |
| Class1 | 13.5 ± 2.1 | 4.5 ± 2.1 | 25.0 ± 2.1 | 6.0 ± 2.1 | 45.2 ± 2.9 | 5.8 ± 2.9 |
| Class2 | 5.6 ± 2.0 | 9.4 ± 2.0 | 5.7 ± 2.6 | 21.3 ± 2.6 | 1.0 ± 1.4 | 43.0 ± 1.4 |
| Accuracy | 69.5 ± 7.8% | 79.8 ± 5.3% | 92.8 ± 3.3% | |||
| Sensitivity | 75.2 ± 11.7% | 80.6 ± 6.8% | 88.7 ± 5.6% | |||
| Specificity | 62.7 ± 13.5% | 78.9 ± 9.6% | 97.6 ± 3.1% | |||
| CI 2 | (51.3 ± 8.2%), (84.0 ± 5.9%) | (67.3 ± 5.9%), (89.0 ± 4.0%) | (85.8 ± 4.2%), (96.9 ± 2.2%) | |||
| p value | 0.122 ± 0.153 | <0.05 | <0.05 | |||
1 Class 1, class of samples lower than cut-off limits; Class 2, class of samples higher than cut-off limits 2 CI, Confidence Interval 95%.