Methods: In an alkaline setting,CTS and CAA were condensated to form CMCTS,which was then isolated and purified by the way of isoelectric point(pI) precipitation.

• 方法： 在碱性条件下壳聚糖与一氯醋酸缩合成羧甲基壳聚糖，产物用等电点沉淀法分离纯化，同时测定了产物等电点。