Synthesis and Antioxidant Activity of Carboxymethyl Chitosan-Fe

The antioxidant activities in vitro of carboxymethyl chitosan-Fe which was synthesized before in our lab were investigated by pyrogallol autoxidation and DPPH method. The results showed that in the setting concentration range: 0.125 mg/mL - 2 mg/mL, the antioxidant activities increased with the elevation of concentration. The antioxidant activities of carboxymethyl chitosan-Fe were better than those of carboxymethyl chitosan. The clearance rates of superoxide anion free radical and DPPH of 2.0mg/mL carboxymethyl chitosan-Fe were 62.68% and 56.12%. The results proved the successful synthesis of carboxymethyl chitosan-Fe and it may become a multi-function organic ferruginous polysaccharide type.