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核技术使用的原材料中,只允许存在痕量稀土元素,因为它们中的钐、钆、铕、镝的热中子俘获截面大。由于制备核纯铀、钍金属时,需要大量钙作为还原剂,因而也要严格监测金属钙中稀土元素的含量。我们采用了β-二酮类的1-苯基-3-甲基-4-苯甲酰基吡唑啉酮-[-5](以下简称 PMBP)萃取法,自大量钙中萃取分离出痕量稀土元素。先将金属钙中加入水生成氢氧化钙后加盐酸溶
Only trace amounts of rare earth elements are allowed in raw materials used in nuclear technology because of the large thermal neutron capture cross sections of samarium, gadolinium, europium and dysprosium among them. Due to the preparation of nuclear pure uranium, thorium metal, the need for a large amount of calcium as a reducing agent, which also must strictly monitor the content of rare earth elements in metallic calcium. We used β-diketone 1-phenyl-3-methyl-4-benzoyl pyrazolone - [- 5] (hereinafter referred to as PMBP) extraction method, extracted from a large amount of calcium trace trace Rare earth elements. The first metal calcium added water to generate calcium hydroxide plus hydrochloric acid