To complement the characterization, we assessed the chemical composition of pure alginate fibers crosslinked with the ethanolic solution of Fe(BF4)2 and Class I and II fibers using energydispersive X-ray spectroscopy (EDX). The spectra acquired is consistent with the expected composition of the SCO composite fibers and confirms the presence of C, O, Fe, and N, (Figures and). In contrast, N was not detected in the pure alginate fibers (Figure ).