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文献曾报道,用P_(204)萃取提纯钆得到99.9%的产品。但是,由于钆与铕的分离系数较小(βGd/Eu=1.5),再则P_(204)是正序萃取,
It has been reported in the literature that 99.9% of the product was purified by P_ (204) extraction of gadolinium. However, since the separation coefficient of gadolinium and europium is small (βGd / Eu = 1.5), P 204 is the positive-sequence extraction,