氢化物发生-原子荧光法同时测定铀矿石中的砷和汞  

Simultaneous Determination of As and Hg in Uranium Ore by Hydride Generation Atomic Fluorescence Spectrometer

作　　者：丁媛媛 卢阳 杜凯华 刘武燃 郭国龙[1] DING Yuanyuan;LU Yang;DU Kaihua;LIU Wuran;GUO Guolong(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China)

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《铀矿冶》2024年第3期50-55,共6页Uranium Mining and Metallurgy

摘　　要：建立了氢化物发生-原子荧光光谱法同时测定铀矿石中As和Hg的方法,考察了消解温度、消解时间、载流体系、KBH4浓度、铀含量对检测结果的影响。结果表明:在125℃条件下,用(1+1)王水消解铀矿石60 min、以(5+95)盐酸为载流、2.0%的KBH4溶液为还原剂时,测定结果最优,该方法对As和Hg的检出限分别为0.006、0.001μg/g,相对标准偏差分别为2.46%和4.22%,加标回收率分别为98%~103%和97%~106%。该方法准确性和精密度较高,可满足铀矿石中As和Hg的测定要求。A method for simultaneous determination of As and Hg in uranium ore by hydride generation atomic fluorescence spectrometer was established,and the effects of digestion temperature,digestion time,medium system,KBH 4 concentration,and uranium content on the detection results were investigated.The results show that the optimal conditions for this method are to dissolve uranium ore with(1+1)aqua regia for 60 minutes at 125℃,(5+95)HCl as the medium and 2.0%KBH 4 solution as the reducing agent.The detection limits of this method are 0.006μg/g(for As)and 0.001μg/g(for Hg),with relative standard deviations of 2.46%(for As)and 4.22%(for Hg),and recovery rates of 98%~103%(for As)and 97%~106%(for Hg).This method has high accuracy and precision,and can meet the requirements for the determination of As and Hg in uranium ore.

关 键 词：氢化物发生-原子荧光法 铀矿石 As HG 加标回收率 

分 类 号：O657.31[理学—分析化学] TN92[理学—化学] TL212[电子电信—通信与信息系统]