NATURAL PRODUCT RESEARCH AND DEVELOPMENT ›› 2014, Vol. 26 ›› Issue (10): 1677-1679.

• Article • Previous Articles     Next Articles

Antioxidant Activity of Carboxymethyl Chitosan Metal Complexes

FENG Xiao-qiang1*,LI Xiao-fang1,YANG Sheng2,CHEN Xue-xi1   

  1. 1School of Life Sciences and Chemistry,Tianshui Normal University,Gansu Tianshui 741001, China; 2 Ding Xi Teachers’ College,Gansu Dingxi 743000, China
  • Online:2014-10-30 Published:2014-10-31

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Abstract: In this study,the antioxidant activities of carboxymethyl chitosan metal complexes were evaluated using hydroxyl free radical scavenging assay, superoxide anion free radical scavenging assay and reducing power assay.The results showed that all of the metal complexes exhibited the antioxidant activity in different levels.The order of carboxymethyl chitosan metal complex’s scavenging effect on hydroxyl free radical was CMC-Cu> CMC-Co>CMC-Ag> carboxymethyl chitosan > chitosan;the order carboxymethyl chitosan metal complex’s scavenging effect on superoxide anion free radical was CMC-Ag> CMC-Cu> CMC-Co>carboxymethyl chitosan > chitosan,and the order of carboxymethyl chitosan metal complex’s reducing power was CMC-Co> CMC-Ag> CMC-Cu> carboxymethyl chitosan > chitosan.The content of Cu2+ was related to antioxidant activity of CMC-Cu.

Key words: carboxymethyl chitosan, metal complex, antioxidant activity

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