冠醚苯并12-冠-4和二苯并14-冠-4及其衍生物的PVC膜锂离子选择性电极的研制和性能比较  

Development of Crown Ether-based PVC Membrane Lithium Ion-Selective Electrode

作　　者：仰蜀薰[1] 张慧敏[1] 黄枢 田宝芝 

机构地区：[1]郑州大学化学系,450052 [2]四门大学化学系,610064

出　　处：《化学传感器》1995年第1期40-44,共5页Chemical Sensors

摘　　要：为提高冠醚类,中性载体锂离子选择性电极的选择性和灵敏性以扩大其‘应’用,合成了一系列苯并12—冠—4和二苯并14—冠—4及其衍生物,分别以它们为活性物质,选择多种溶剂研制成PVC膜锂离子选择性电极,进行测定比较其性能,结果表明,以3′—(正辛氧甲基)苯并12—冠—4为活性物质,磷酸三丁酯为溶剂的PVC膜锂离子电极的性能较好、它的Nerust线性响应浓度范围为1.0×10^(-4)—1.0×10^(-1)mol/L,平均响应斜率为68.4mV/dec.(18℃);对碱金属和碱土金属离子的选择均很好,如:K_(Li^+)^(pot),Na^+为8.9×10^(-4)Some derivatives of benzo-crown ether are synthesized for the construction of titled lithium selective electrode. Different solvents are used for the improvement of operation features. The tested results show that the electrode consisting 3'-(noctyl-methoxy)-benzo-12-crown-4 and tributyl phosphate has the better behaviors. The linear range of this :electrode is around 1.0×10-4 to 1.0× 10-1mol/L and the mean slope is 68.4mV/decade (18℃). It shows the ideal selectivity to alkali and alkali earth metal elements and the selectivity coefficient for Na+ is 8.9×10-4.

关 键 词：冠醚 锂 电极 离子选择性电极 灵敏性 

分 类 号：O623.423[理学—有机化学] O657.1[理学—化学]