中子活化分析测定地质样品中贵金属的一个简单组分离程序

NEUTRON ACTIVATION DETERMINATION OF NOBLE METALS IN GEOLOGICAL SAMPLES USING SELECTIVE GROUP SEPARATION SCHEME

摘要: 本文采用放射化学分离-螯合离子交换树脂方法从复杂的地质样品中分离出微量的贵金属Ir,Re,Pt,Au,Os等。实验程序对Ni,Co,Na,Sr,Sm,Lu,La,Cs,Rb,Ta等的去污效果达100％;对Fe,Sc,Eu,Ce,Yb等的去污效果在99％以上;对Hf,Ba,Sb去污效果高于95％。从而大大提高了活化分析测量地质样品中上述贵金属的灵敏度,该方法是测量地质样品中微量贵金属的一种有效方法。

Abstract: In this paper a radiochemical procedure for the determination of noble metals in geological samples is described. It consists of thermal neutron irradiation, melt of sample, selective absorption of noble metals on chelating resin and high resolution γ spectrometry. In the procedure, the BE-1- 5- 1 resin retains no Ni, Co, Na, Sr, Sm,Lu,La,Cs,Rb and Ta,and retains only 1% of Fe, Sc,Eu,Ce and Yb and 5% of Ba,Hf and Sb. It is effective for determining noble metals in geological samples.