本文研究了不同基团取代的酰代吡唑酮和各种有机羧酸(苯甲酸、α—萘甲酸、二苯羟乙酸和肉桂酸等)对铈(Ⅲ)的协同萃取。并用斜率法、归一法和同位素示踪技术,测定和推计了在盐酸和硝酸体系中协萃合物的组成和协萃平衡常数。在研究过程中以HTTA和HBTA作为对照。 In this paper, the synergistic extraction of cerium (Ⅲ) by different groups of substituted pyrazolones and various organic carboxylic acids (benzoic acid, α-naphthalene carboxylic acid, benzilic acid and cinnamic acid) were studied. The compositions and the equilibrium constants of the complexes were determined and estimated by using slope method, normalization method and isotope tracing technique. HTTA and HBTA were used as controls during the study.