Figure 2

XRF spectra associated to the “pulp” and the “pulp + skin” of D1 sample. The spectra referred to the “D1—pulp” sample, obtained by configuring the Bruker spectrometer with Cu/Ti/Al (0.006” Cu, 0.001” Ti, 0.012” Al) and Ti/Al (0.001” Ti, 0.012” Al) filters, are plotted in (A) and (B), whereas XRF spectrum associated to “D1—pulp + skin” sample, measured with Ti/Al filter, is plotted in (C). In (A), (B) and (C), the raw spectra are reported in black, data global fit and background evaluation in red and green, respectively. In (D) the comparison of XRF spectra after background subtraction for the “pulp” of D1 sample obtained by using Ti/Al/Cu and Ti/Al filters (blue and red line, respectively) is shown; in the same plot, net XRF spectrum for the “pulp + skin” of D1 sample measured with Ti/Al filters is reported as a green line. Finally, plot (E) reports the extracted element yield distributions concerning the three experimental configurations M1, M2 and M3. Statistical error bars are included.