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本文探索稀土在非水介质中与冠醚形成络合物后是否有可能得到还原电位彼此分开的伏安波峰用于测定个别稀土。我们已报道了铕与18-冠-6络合物在丙酮中可得到还原电位校正(E_ρ=+0.09V,Ag/AgCl)的可逆还原峰,电位受丙酮中微量水的影响,但不受氧和其它稀土的干扰,这与朱天培等报道的丙酮中铕18-冠-6络合物的E_(1/2)(+0.10V,SCE)大致相等。我们进一步将丙酮脱水纯化,研究了稀土在丙酮中的还原行为,并解释了微量水和氧对波
This article explores the possibility of obtaining a voltammetric peak where the reduction potentials are separated from each other after rare earths form complexes with crown ethers in non-aqueous media for the determination of individual rare earths. We have reported a reversible reduction peak for the reduction potentials (E_ρ = + 0.09V, Ag / AgCl) of europium and 18-crown-6 complex in acetone at potentials affected by traces of water in acetone but not Oxygen and other rare earths, which is approximately equal to the E 1/2 (+ 0.10V, SCE) of europium 18-crown-6 complex in acetone reported by Zhu et al. We further dehydrated and purified acetone, studied the reduction behavior of rare earth in acetone, and explained the effect of trace water and oxygen on the wave