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海洋沉积物中微量铀、钍、稀土的离子交换分离与测定
吴明清1, 谢小风2
1.中国科学院地球化学研究所;2.华东地质学院分析系
摘要:
本文采用国产大孔径的阴、阳离子交换树脂系统地研究了微量铀、钍、稀土的离子交换分离条件,在此基础上拟定了经一次溶样离子交换法分离,然后用偶氮胂Ⅲ光度法连续测定海洋沉积物中微量铀、钍、稀土的分析方法。经国内地球化学标准参考样的检验和应用于实际样品分析,证明本法具有准确度高、重现性好、经济和简便易行等特点。
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DOI：
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基金项目:
ION EXCHANGE SEPARATION AND DETERMINATION OF TRACE U, TH, ΣREE IN MARINE SEDIMENTS
Abstract:
In this paper the connective ion-exchange separation of trace U, Th, ΣREE with the macroreticular cation and anion resins made in China is studied, and a determination method of trace U, Th, ΣREE by spectrophotometry using arsenazo Ⅲ after separation proposed. The test results show that this method has the advantages of speedy determination for accuracy of 1 ppm for U, 2ppm for Th, and 20ppm for ΣREE.
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