AG MP-1阴离子交换树脂元素分离方法再研究  

Further Investigation on Elemental Separation Using AG MP-1 Anion Exchange Resin

作　　者：孙剑[1,2] 朱祥坤[2] 唐索寒[2] 陈岳龙[1] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]中国地质科学院地质研究所国土资源部同位素地质重点实验室,北京100037

出　　处：《现代地质》2010年第5期866-869,共4页Geoscience

基　　金：国家自然科学基金项目(40973037);国土资源部公益性行业科研专项项目(200911043-14)

摘　　要：目前不同实验室建立的用于MC-ICP-MS铜铁锌同位素测定的离子交换分离方法多适用于一般地质样品的Fe同位素高精度测定,而对于一些类似于白云鄂博Fe-Nb-REE矿床的特殊地质样品,这些分离方法的适用情况有待进一步研究。为研究REE、Nb、Ta、Co、Cu、W等元素是否能够和Fe有效分离,采用AG MP-1阴离子交换树脂,依次以6mol/L HCl和2 mol/L HCl为介质对这些元素进行淋洗,并利用ICP-AES和ICP-MS对淋洗液中的各元素含量进行测定。实验结果表明,在6 mol/L HCl介质条件下,运用AG MP-1树脂可以将REE、W与Fe有效地分离,能够将Nb、Ta的含量降低一个数量级;Fe、Co、Cu的淋洗行为和前人研究结果一致。Methods of chromatographic separation of Cu,Fe and Zn using AG MP-1 anion exchange resin developed previously were focused mainly on the purification of ordinary geological materials.It is unclear whether those methods are suitable for separation of some special geological materials such as Bayan Obo ore samples which show extreme enrichment of REE and Nb.To understand whether elements including REE,Nb,Ta,Co and W can be separated from Fe,experiments were carried out using AG MP-1 anion exchange resin with 6 mol/L HCl and 2 mol/L HCl media.The results show that the method established before can make effective separation of REE and W with Fe,and that nearly 90% of Nb and Ta can be washed out before Fe elution using 6 mol/L HCl.The behaviors of Fe,Co and Cu observed in this investigation are consistent with previous studies.

关 键 词：离子交换分离 FE同位素 稀土元素 铌 钽 钨 

分 类 号：P599[天文地球—地球化学]