Liquid-liquid extraction system consisting of oxytetracycline (HOTC) in dichloromethane was developed for extraction of Nd +3 and Eu +3 from acidic solutions using radiometric technique. Various extraction parameters such as pH, equilibration time and metals concentration were optimized. Slope analysis method was used to study the composition of product and was found to be M(OTC) 3 [here M=Nd +3 or Eu +3 and OTC = conjugate base of HOTC]. Among cations Al +3 and Fe +3 while among anions F − effected the extraction of these metals. Higher separation factor of these metals was found with many others. The method was successfully applied on spiked sea water.

中文翻译：

---

在二氯甲烷中使用土霉素从水性介质中液-液萃取Nd+3和Eu+3

开发了由土霉素在二氯甲烷中组成的液-液萃取系统，用于通过放射技术从酸性溶液中萃取Nd +3和Eu +3。优化了各种提取参数，例如 pH、平衡时间和金属浓度。斜率分析法用于研究产物的组成，发现为M(OTC) 3 [此处M=Nd +3 或Eu +3 且OTC = HOTC 的共轭碱]。阳离子Al +3 和Fe +3 而阴离子F - 影响这些金属的提取。在许多其他金属中发现了这些金属的更高分离系数。该方法已成功应用于加标海水。