原子吸收分光光度法测定蒙脱石散阳离子交换容量

Determination of Cation Exchange Capacity of Montmorillonite Powder by Atomic Absorption Spectrometry

采用氯化钡-硫酸镁法进行供试品溶液制备,原子吸收分光光度法进行测定,建立了蒙脱石散阳离子交换容量的测定方法。研究显示该方法的重复性、精密度和回收率均良好,对7个不同厂家的16批蒙脱石散样品进行阳离子交换容量测定,结果为81.35~91.22 mmol/100 g。研究表明该方法操作简便,检测准确,可作为蒙脱石散阳离子交换容量的测定方法,对质量进行控制。

Barium chloride-magnesium sulfate method was used to prepare the sample solution and it was measured by atomic absorption spectrophotometry to establish a method for the determination of cation exchange capacity of montmorillonite powder.The results indicated the repeatability,precision and recovery of the method were all good.The cation exchange capacity of 16 batches of montmorillonite powders from 7 different manufacturers were determined from 81.35 to 91.22 mmol/100 g.The method is simple and accurate,and it can be used to determine the cation exchange capacity of montmorillonite powder.