Fig. 2From: A new sorbent based on MWCNTs modification for separation/preconcentration of trace amounts of Cd(II), Cr(III), Cu(II), Ni(II), and Pb(II) and their determination by flame atomic absorption spectrometryTEM images of raw MWCNTs (a), oxidized MWCNTs (b), and functionalized MWCNTs by EDDA (c)Back to article page