聚合物螯合力的测定及其与4A混合体系的螯合力变化

Determination of calcium chelating capacity of polymers and the mixtures of polymer and 4A zeolite

利用EDTA络合滴定法测定6种聚羧酸类聚合物对钙离子的螯合力,并将该方法应用于存在不溶物体系钙离子螯合力的测定。结果表明,该方法终点判断准确、操作简单、具有较好的精密度。4A沸石与聚合物混合体系对钙离子的螯合力研究表明,混合体系的螯合力会有所下降,但是变化相对较小。

Calcium chelating capacities of six different kinds of polyacrylate polymers were determined by the EDTA complexometric titration method, and calcium chelating capacities of the systems with insoluble matters were also determined by this method. The results indicated that this method was easy to determine the end-point and to manipulate with high accuracy. The studies on the calcium chelating capacity of mixtures of 4A zeolite and polymer indicated that the chelating capacities would decrease only a little.