30%TBP/煤油中DBP和MBP的离子色谱分析

Measurement of DBP and MBP in 30%TBP/Kerosene by Ion Chromatography

采用离子色谱作为检测仪器,建立了简单、快速、灵敏地测定30%TBP/煤油中DBP和MBP的新方法。以去离子水为反萃剂将有机相中DBP和MBP反萃到水相,去除有机相干扰,离子色谱仪进行检测。当DBP浓度在0.01~6.0 mmol/L、MBP浓度在0.02~2.5 mmol/L时,标准曲线均具有良好的线性,相关系数r 2均达到0.999,DBP的检出限为5.0μmol/L,MBP的检出限为4.0μmol/L。采用建立的方法对模拟30%TBP/煤油生成的辐解产物进行重加回收实验,DBP的重加回收率在92%~96%,模拟样品6次平行测定的s r=2.1%。

A simple and sensitive method for the measurement of DBP and MBP in 30%TBP/kerosene was established by using ion chromatography.DBP and MBP was back extracted from organic phase to aqueous phase by deionized water,then the sample can be determined by ion chromatography without the interference of organic phase.The standard curves of DBP and MBP show good linearity with r 2=0.999,with DBP concentration in the range of 0.01-6.0 mmol/L and MBP concentration in the range of 0.02-2.5 mmol/L.The detection limits are 5.0μmol/L for DBP and 4.0μmol/L for MBP.The proposed method was utilized to detect the DBP produced by irradiation 30%TBP/kerosene.The results show that the recovery of DBP is 92%-96%,and s r is 2.1%(n=6).This method is simple,accurate and highly sensitive,and it can be used to determine the DBP and MBP concentration in 30%TBP/kerosene.