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研究了新型功能化离子液体1-戊基-3-(3-乙基苯基膦酰基)丙基咪唑双(三氟甲基磺酰基)亚胺盐的合成及对Nd(Ⅲ)的萃取性能,考察了水相酸度、萃取时间、杂质离子等对萃取性能的影响。结果表明,在0.13g该离子液体中,萃取时间为30min,5 mL pH 9.0的Nd(Ⅲ)溶液浓度在0.1～5.0μg/mL时,其线性回归方程为Y=-29352+2.423×106ρ(μg/mL),线性相关系数和最低检测限分别为0.9982和0.0025μg/mL。同时研究了离子液体的回收利用,在5%HNO3介质中洗脱30 min,Nd(Ⅲ)洗脱率达86%以上,回收后的离子液体可再利用。
The synthesis of new functionalized ionic liquid 1-pentyl-3- (3-ethylphenylphosphono) propylimidazolium bis (trifluoromethylsulfonyl) imide and the extraction of Nd (Ⅲ) The effects of aqueous phase acidity, extraction time and impurity ions on the extraction performance were investigated. The results showed that when the concentration of Nd (Ⅲ) in 5 mL pH 9.0 was 0.1 ~ 5.0 μg / mL, the linear regression equation was Y = -29352 + 2.423 × 106ρ μg / mL), the linear correlation coefficient and the lowest detection limit were 0.9982 and 0.0025 μg / mL, respectively. At the same time, the recovery and utilization of ionic liquid was studied. The elution rate of Nd (Ⅲ) was over 86% after the elution was carried out in 5% HNO 3 medium for 30 min. The recovered ionic liquid could be reused.