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air, water and soil quality qualité - ER Ambiente - Regione Emilia ...

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Figure 2a - Comparison of total (XRF) vs. pseudo-total (AR) Ba, Cr, Cu, Ni concentrations<br />

for the studied samples. The 1:1 line is reported in the scatter diagram for comparison. On<br />

the right column the frequency histograms for the considered variables.<br />

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