Fig. 9
From: X-ray fluorescence spectroscopy (XRF) for metallome analysis of herbarium specimens
An elemental concentration image generated by GeoPIXE after processing a µXRF image (a) was classified into background and leaf (black and green in b). Three spots were drawn at the apex, lamina, and base of the leaf part. The average concentration of the whole leave (green in b) was compared to the average concentration of the three spots and their combinations. The results are shown in Table 2