【摘要】 <正> 锂离子选择性电极近年来有了较大的发展。文献曾报道了用冠醚^1、2、邻菲咯啉衍生物^[3]、四苯硼酸盐及其衍生物^[4]、杯芳烃等作敏感物质制备锂离子选择性电极。但这些物质制备的电极大都存在一些缺点,如材料不易获得,电极的线性范围较窄等。因此寻找新的敏感材料以进一步提高电极性能显得更为迫切。碱金属萃取化学研究为寻找新的敏感物质提供了又一途径。邓渝林^[6]等人研究了含氟β-二酮协同萃取液膜体系从 Li⁺、Na⁺、K⁺混合液中提取 Li⁺,该体系对 Li⁺有很好选择性而对 Na⁺、K⁺萃取能力较差。Shigeo Umetani^[6] 等研究了 HPMBP-TOPO 协同萃取 Li⁺,Li⁺萃取率为96%,而 Na⁺仅为3%,其分离因子达更多还原

【Abstract】 The PVC membrane lithium ion selective electrode based on l-phenyl-3-methyl-4-benzoyl-5-pyrazolone as the carrier, tributyl phosphate as the plasticizer, tri-n-octyl phosphine oxide as the synergetic extraction reagent was prepared. It shows Nernstain response to lithium ions in the range of 1. 00-6.00×10-5mol@ L-1 with the average slope 64. 6mV/decade. The selectivity coefficients for Li+ related to Na+,K+,Ca2+ were 7. 9×10-2,5. 0×10 2,3. 1 ×10-2, respectively. The other characters of the electrode were satisfactory basically.更多还原