| Samples | Observations | Maximum (g∙kg−1) | Minimum (g∙kg−1) | Mean (g∙kg−1) | Standard deviation (g∙kg−1) |
| Total Samples Calibration Validation | 92 69 23 | 0.352 0.352 0.247 | 0.073 0.079 0.073 | 0.145 0.147 0.140 | 0.052 0.055 0.044 |