Comparing the XANES spectrum across the Ag L2,3 edge
(fig. 3) from the AgNP exposed sea urchin (red) with the
spectrum of AgNPs within Lolium multiflorum plants (black)
(taken from Yin et al., 2011), it is observed that the lowest
energy peak of both spectra is similar. This peak is assigned
to oxidized Ag species complexed with S and O/N