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以聚偏氟乙烯膜(PVDF)为支撑体,煤油为膜溶剂,N-N-二(1-甲基庚基)乙酰胺(N503)为流动载体,研究了分散支撑液膜体系中金属Pd(Ⅱ)的传输行为;考察了料液相酸度、分散相膜溶液与解析液体积比以及分散相中KSCN浓度对Pd(Ⅱ)传输的影响。结果表明,当料液相中盐酸浓度为0.10mol.L-1、分散相中膜溶液与解析液KSCN体积比为30:30、解析液KSCN浓度为1.60mol.L-1时,该分散支撑液膜体系对金属Pd(Ⅱ)具有良好的传输作用。在最佳传输条件下,Pd(Ⅱ)起始浓度为5.00×10-5mol.L-1时,130min的传输时间分散支撑液膜体系传输效率可以达到79.8%,而传统支撑液膜只有67.8%。
The Pd (II) -supported liquid membrane system was prepared by using polyvinylidene fluoride (PVDF) membrane as support, kerosene as membrane solvent and NN-bis (1-methylheptyl) acetamide ); The influence of the liquid phase acidity, the volume ratio of disperse phase membrane solution to the analyte and the concentration of KSCN in the disperse phase on the Pd (Ⅱ) transport were investigated. The results show that when the concentration of hydrochloric acid in the liquid phase is 0.10mol.L-1, the volume ratio of KSCN in the disperse phase medium to the analytical solution is 30:30 and the concentration of KSCN in the analytical solution is 1.60mol.L-1, Liquid film system on the metal Pd (Ⅱ) has a good transmission. When the initial concentration of Pd (Ⅱ) is 5.00 × 10-5mol.L-1, the transmission efficiency of dispersed support liquid membrane system can reach 79.8% at 130min transmission time under the optimal transmission conditions, while the conventional support liquid membrane only has 67.8% .