摘要
建立了离子色谱法同时测定磷酸二氢钾中PO43-、Cl-、F-的方法,在12 min内实现对3种阴离子的分离及同时测定,实验过程通过PO43-的含量计算磷酸二氢钾的纯度。在最佳实验条件下,建立3种离子的标准曲线,其r为0.999 2~0.999 9,检出限为0.051~0.30μg/mL,样品平均加标回收率为95.6%~104.5%,相对标准偏差为3.1%~4.9%。将测定结果与HG 2321—1992《磷酸二氢钾》所规定的方法进行差异性分析,结果表明,实验所建立的方法与标准方法无显著性差异。该方法具有简单、快速、重现性好的优点,适用于磷酸二氢钾生产过程的工艺控制。
Ion chromatographic method for determining PO4^3-, Cl^-,and F^- of potassium dihydrogen phosphate （KDP） was established.The three anions can be separated and determined simultaneously in 12 rain.The purity of potassium dihydrogen phosphate can be calculated through the content of PO4^3-.Under the optimal experimental conditions, the standard curves of three anions were obtained ,the correlation coefficient r was 0.999 2-0.999 9 ;the detection limits were in the range of 0.051 - 0.30 g/mL;the average raddition standard recovery rates were at 95.6%-104.5%, and the relative standard deviations were at 3.1%-4.9%.The difference analysis on the established method and standard method （HG 2321-1992） indicated that there was no significant difference between them.The simple and fast method has advantage of good reproducibility.It is especially suitable for the process control of production of KDP.
出处
《无机盐工业》
CAS
北大核心
2014年第2期68-70,共3页
Inorganic Chemicals Industry
