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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
This paper reports the determination of trace rare earths in nuclear pure thorium dioxide by ultrasonic atomization plasma spectrometry. Matrix thorium and trace rare earth separation methods include extraction, ion exchange and reversed-phase chromatography, in which the extraction method is relatively simple and fast. In this paper, the synergistic extraction of thorium with D2EHPA-TBP-OK in HNO3 system, the separation of rare earths, the interference of rare earth with Fe, Cu, Ca, Al, Mg by the interference of NH4CNS and sulfosalicylic acid, Extraction of rare earth with PMBP-benzene, 4N HC1 stripping, ICP-AES method of measuring rare earth, with yttrium as an internal standard, this method of analysis of high sensitivity and speed. 1. Instruments and reagents PGS2 two-meter plane grating spectrograph; GP3.5D1 high-frequency plasma generator; CW1 ultrasonic generator; double pool atomizer; can