基于1-丁基-3-甲基咪唑十二烷基硫酸盐为活性物质的PVC膜电极的性能及其应用

以离子液体1-丁基-3-甲基咪唑六氟磷酸盐（BmimPF6）为活性物质制得离子选择性电极,该电极对离子液体BmimCl有较好的电位响应,线性响应浓度范围为1×10^-5mol/L～1×10^-2mol/L.用十二烷基硫酸钠（SDS）与BmimPF6进行阴离子交换制得的1-丁基-3-甲基咪唑十二烷基硫酸盐（BmimDS）作为活性物质,能降低电极的检测下限,线性响应浓度范围拓展为1×10^-6～1×10^-2mol/L.该电极显示出良好的稳定性和重现性.此外,该电极可作为电位滴定法的指示电极用于对四丁基氯化铵（TBACl）、十二烷基硫酸钠（SDS）的滴定分析.

The ion-selective PVC membrane electrode based on 1-butyl-3-methylimidazolium dodecyl sulfate

Ion selective electrode using BmimPF6 as active material was fabricated.The electrode showed a good response to ionic liquid BmimCl,with linear response range from 1×10-5 mol/L to 1 ×10-2 mol/L.With 1-butyl-3-methylimidazolium dodecyl sulfate(BminDS) as active material,could further reduce the electrode detection limit,and the linear response range expanded to be 1×10-6 ~1×10-2 mol/L.The electrode showed good stability and reproducibility.The electrode was also used as the sensing electrode in the potentiometric titration of tetrabutylammonium chloride and SDS.