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In order to improve the selectivity of copper(II)/iron(III), crosslinked N-(2-pyridylmethyl)chitosan (PMC) with lower affinity for iron(III) was synthesized by crosslinking the Schiff's base formed in order to prevent amino groups to be metal adsorption sites from a attack of (chloromethyl)oxirane. The final chitosan derivative, PMC, was obtained by reducing the imine moiety of the Schiff's base...
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