Table 3.
Values of concentration (expressed in ppm) of four main pigments in fresh EVOOs (i.e., chlorophyll a, pheophytin a, β-carotene and lutein) as obtained from the deconvolution analysis of UV-vis absorption spectra the EVOO samples after about 1 month from their production. Other pigments, if present, are in smaller amount to produce significant improvement of the spectral analysis as reported in the text. Total amount of pigments is also reported. For each EVOO sample the concentration values obtained from the best fitting analysis are shown with the respective value of R2.
| Label | Chlorophyll a | Pheophytin a | β-Carotene | Lutein | Total Pigments | R 2 |
|---|---|---|---|---|---|---|
| A | 7.8 ± 0.2 ppm | 7.5 ± 0.1 ppm | 7.1 ± 0.1 ppm | 3.0 ± 0.1 ppm | 25.4 ± 0.5 ppm | 0.995 |
| B | 5.6 ± 0.2 ppm | 4.3 ± 0.2 ppm | 6.5 ± 0.1 ppm | 1.7 ± 0.1 ppm | 18.1 ± 0.6 ppm | 0.996 |
| C | 9.8 ± 0.2 ppm | 6.0 ± 0.1 ppm | 3.3 ± 0.2 ppm | 10.4 ± 0.2 ppm | 29.5 ± 0.7 ppm | 0.997 |
| D | 5.4 ± 0.2 ppm | 4.6 ± 0.2 ppm | 5.5 ± 0.1 ppm | 2.7 ± 0.1 ppm | 18.2 ± 0.6 ppm | 0.996 |
| E | 6.1 ± 0.2 ppm | 2.9 ± 0.1 ppm | 4.4 ± 0.1 ppm | 3.4 ± 0.1 ppm | 16.8 ± 0.5 ppm | 0.995 |
| F | 5.9 ± 0.1 ppm | 3.2 ± 0.1 ppm | 3.4 ± 0.1 ppm | 5.1 ± 0.1 ppm | 17.6 ± 0.4 ppm | 0.995 |
| G | 6.9 ± 0.2 ppm | 4.2 ± 0.1 ppm | 3.5 ± 0.1 ppm | 7.4 ± 0.1 ppm | 22.0 ± 0.5 ppm | 0.996 |