阳离子交换分离-发射光谱法测定金属铀或八氧化三铀中微量硼  

CATION EXCHANGE SEPARATION-EMISSION SPECTROGRAPHIC DETERMINATION OF BORON IN URANIUM METAL OR URANIUM OXIDE

作　　者：关景素 高炳华[1] 姬俊英[1] 石有卿 刘英梅 

机构地区：[1]中国原子能科学研究院

出　　处：《原子能科学技术》1989年第3期40-44,共5页Atomic Energy Science and Technology

摘　　要：文章叙述了阳离子交换分离-发射光谱法测定金属铀或八氧化三铀中微量硼的方法。在试样溶解和蒸发过程中,采用甘露醇络合硼以防止硼的蒸发损失,用阳离子交换分离法将硼与大量铀及其它多种阳离子分离后,用以氟化钠为外加基体,铍为内标,平头石墨电极,交换电弧为激发光源的溶液干渣光谱法测定硼。取样0.4g时,测定下限可达0.012ppm。此时方法的相对标准偏差为±18%,当硼含量为0.04ppm时,相对标准偏差为±9%,方法回收率为108-111%,方法简单、快速、测定下限低、干扰小,经与其它分析方法核对数据,证明方法可靠,可满足测定要求。The spectrochemical method of determination of extremely low concentration,of boron in uranium is described here. The sample is dissolved in HNO_3 aftermannitol is added to complex boron. Then boron is separated from uranium bycation exchange method. After that, the solution of boron is evaporated to dry-ness at low temperature and redissolved in 0.5ml solution containing NaF as anew matrix and Be as an internal standard. Then it is evaporated to dryness oncarbon electrode and exciteded by AC arc. The proposed method can determine as little as 0.012ppm boron with 0.4gsamples. The percentage of recovery is(108～111)%. The relative standard deviationis less than±18% when concentration of boron is 0.012ppm, and less than±9%when concentration of boron is 0,04ppm. The method is simple, rapid sensitiveand reliable. The analytical results of several standard samples agree with those obtainedby other methods.

关 键 词：阳离子交换 发射光谱 测定 

分 类 号：TL271.4[核科学技术—核燃料循环与材料]