电感耦合等离子体质谱法测定有机相中镎  

Determination of Neptunium in Organic Phase by ICP-MS

作　　者：赵立飞[1] 谈树苹[1] 沙顺萍 赵胜洋[1] 白雪[1] ZHAO Li-fei;TAN Shu-ping;SHA Shun-ping;ZHAO Sheng-yang;BAI Xue(China Institute of Atomic Energy,P.O.Box 275(88),Beijing 102413,China)

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

出　　处：《核化学与放射化学》2020年第5期378-382,I0005,共6页Journal of Nuclear and Radiochemistry

摘　　要：建立了电感耦合等离子体质谱法(ICP-MS)测定30%(体积分数,下同)磷酸三丁酯(TBP)/煤油和0.5 mol/L 2-噻吩甲酰三氟丙酮(TTA)/二甲苯中镎的分析方法。样品经异丙醇适当稀释或直接进入ICP-MS分析,在有机进样条件下对仪器和操作参数进行优化和选择,研究了有机相和大量238 U在有机基体中引起的基体和质谱干扰,以钍为内标消除基体干扰。研究结果表明:方法的检出限为1×10^-8 g/L(3 s,n=10);相对标准偏差(s r)为0.8%(n=10)(镎质量浓度为2.02μg/L);加标回收率为95.5%~115%。该法适用于动力堆乏燃料后处理流程以及预处理后0.5 mol/L TTA/二甲苯中镎的分析。A simple,reliable and rapid method was built for determining of neptunium in 30%tributyl phosphate/kerosene and 0.5 mol/L thenoyltrifluoroacetone in xylene by inductively coupled plasma mass spectrometry(ICP-MS)equipped with a sample for organic phase.The instrumental and operating parameters were optimized with the standard solution of organic matrices.The effect of matrix on determination of neptunium was discussed in detail by ICP-MS.The internal standard element of Th was employed to eliminate the signal effect induced by matrix and instrument signal drift.The results suggest that the detection limit(3 s,n=10)of the method is no greater than 1×10^-8 g/L,the relative standard derivations(s r)is 0.8%(n=10),and the recoveries vary from 95.5%-115%.This method is applicable for the determination of neptunium in organic phase from the commercial spent fuel reprocessing.

关 键 词：电感耦合等离子体质谱 镎 30%TBP/煤油 TTA/二甲苯 

分 类 号：TL274[核科学技术—核燃料循环与材料] O657.6[理学—分析化学]