本文研究了二苯并-18-冠-6对~(22)Na、~(45)Ca、~(86)Rb、~(90)Sr-~(90)Y、~(137)Cs和~(144)Ce等放射性核素的萃取和萃取色层分离。冠醚萃取金属离子具有离子对萃取的特征,据此,选择苦味酸根离子为反离子,以三氯甲烷为溶剂。 测定了30℃时Na~+、Rb~+、Cs~+、Ca~(2+)、Sr~(2+)和Ce~(3+)的萃取平衡常数(K_(ex))。对单价和二价金属离子,K_(ex)次序分另0为;Rb~+>Cs~+>Ns~+和Sr~(2+)>Ca~(2+)。 使用二苯并-18-冠-6的萃取色层有效地分离了~(22)Na-~(137)Cs、~(45)Ca-~(90)Sr和~(144)Ce-~(90)Sr-~(90)Y。 In this paper, the effects of dibenzo-18-crown-6 on the activities of ~ (22) Na, ~ 45 Ca, ~ 86 Rb, ~ 90 Sr ~ 90 Y, ~ 137 Cs and ~ (144) Ce and other radionuclide extraction and extraction chromatography. Crown ether extraction of metal ions with ion-pair extraction characteristics, therefore, the choice of picrate ion as a counter ion to chloroform as a solvent. The extraction equilibrium constants (K_ (ex)) of Na ~ +, Rb ~ +, Cs ~ +, Ca ~ (2+), Sr ~ (2+) and Ce ~ (3+) were measured at 30 ℃. For monovalent and divalent metal ions, K_ (ex) order is 0; Rb ~ +> Cs ~ +> Ns ~ + and Sr ~ (2 +)> Ca ~ (2+). The extraction color of ~ (22) Na ~ (137) Cs, ~ (45) Ca- ~ (90) Sr and ~ (144) Ce ~ ~ 90) Sr- ~ (90) Y.