【摘要】 <正> 本文报导了超声雾化等离子体光谱法测定核纯二氧化钍中痕量稀土。基体钍与痕量稀土分离方法有萃取法、离子交换法和反相色层法,其中萃取法比较简便快速。本文采用在HNO3体系中以D2EHPA-TBP-OK协同萃取钍、分离稀土,用NH4CNS、磺基水杨酸隐蔽干扰稀土测定的杂质即Fe、Cu、Ca、Al、Mg,然后调pH为5.5,用PMBP-苯萃取稀土,4N HC1反萃,ICP-AES法测稀土,用钇作内标,此分析法灵敏度高,速度快。1.仪器和试剂 PGS2型二米平面光栅摄谱仪;GP3.5D1高频等离子体发生器;CW1超声波发生器;双层水池雾化器;可更多还原

【Abstract】 A method is described to determine trace amounts of rare earth elements (REE) in nuclear pure thorium dioxide using desolvating ultrasonic nebulizing ICP spectrometry. The D2EHPA-TBP-OK synergic extraction system was used for separation of matrix Th and REE.After thorium was separated from REE, the REE was extract by PMBP-benzene and using NH4CNS and thiosalicylate as masking agent for Al, Mg, Fe, Cu. Then REE were back-extracted into 4N HC1 and determined by ICP-AES using Y as internai standard. The sensitivity and speed of this method is high.更多还原