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稀土的乙酰丙酮络合物的研究已有80多年的历史。三价稀土离子与乙酰丙酮形成络合物的稳定常数早巳系统地测定过。但是,二价稀土离子,例如铕(Ⅱ)与乙酰丙酮形成络合物的稳定常数未见报道。本文叙述试用pH法测定乙酰丙酮铕(Ⅱ)的稳定常数。
Rare earth acetylacetone complex has been more than 80 years of history. The stability constants for the formation of complexes of trivalent rare earth ions with acetylacetone have been determined systematically. However, the stability constants of divalent rare earth ions such as europium (II) complex with acetylacetone have not been reported. This paper describes the determination of the stability constant of europium (Ⅱ) acetylacetonate by the probed pH method.