制备了多种甲壳质（ChN）与重金属离子的配合物，研究了其在4000~400cm－1范围内FTIR特征，并对其主要吸收谱带作了经验归属．研究结果表明，在CTN的金属螯合物中，除了-OH和-NH-参与了配位外，－C＝O亦在不同程度上参与了配位．配位后的特征峰的变化主要表现在峰强度上而非峰位置． A series of complexes of chitin (ChN) with heavy metal ions were prepared. Their FTIR characteristics were studied in the range of 4000-400 cm-1, and their main absorption bands were assigned. The results show that, in the metal chelate CTN, in addition to-OH and -NH- involved in the coordination, -C = O is also involved in varying degrees of coordination. The characteristic peak after the coordination changes mainly in the peak intensity rather than the peak position.