By using the spectrophotometry,tests were carried out to compare the scavenging effect of superoxide anion free radical O2-.between the chitosan and the mixture of chitosan and calcium ion.

• 用分光光度法；分别对壳聚糖和壳聚糖与钙离子的配合物清除超氧阴离子自由基(O2-.；)的效果进行了测定。