用于XRF测量微量Np的磁助分离制样方法  

Magnetically Assisted Sample Preparation for Trace Np Analysis by XRF

作　　者：张彤[1] 全葳[2] 郑维明[1] 吴继宗[1] 康海英[1] 邓惟勤[1] 邵少雄[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413 [2]环境保护部核与辐射安全中心,北京100082

出　　处：《核化学与放射化学》2015年第4期215-219,共5页Journal of Nuclear and Radiochemistry

摘　　要：建立磁助捕集分离制样法,使用超顺磁性TiOA固相捕集剂捕集溶液中的镎,利用外加磁场快速分离制样,实现捕集、分离及制样同时完成,可直接使用X射线荧光测量样品中Np的含量。研究了反应时间、固相捕集剂用量、液相体积及酸度等因素对测量的影响,给出了推荐测量分析流程。使用磁助捕集分离制样,对Np的质量检出下限为0.12μg,质量浓度检出下限为0.04mg/L,满足Purex流程3EU工艺点测量Np的要求。A magnetically assisted sample preparation process for capturing and separating trace Np was established.With the application of TiOA paramagnetic capture,the sample can be prepared quickly while concentration and separation are all done.The influences of reacting time,the mass of capture,the volume and acidity of aqueous phase on the sample preparation were studied.The detection limit of this method for Np is 0.12μg.The mass concentration detection limit is 0.04mg/L,which meets the requirements of analyzing Np by XRF at 3EU in Purex.

关 键 词：磁助分离制样 微量镎 X荧光 

分 类 号：O658[理学—分析化学] O614.352[理学—化学]