缬氨霉素钾离子选择性涂丝电极和小型Ag/AgCl参比电极的研制及应用  

The Research and Application of Valinomycin Potassium Coated-Wire Ion - Selective Electrode and Mini- Silver-Silver Chloride Referance Electrode

作　　者：曾义 高光斗 郭鼎力[2] 

机构地区：[1]北京市刑事科技研究所 [2]成都科技大学

出　　处：《传感器技术》1994年第5期30-33,共4页Journal of Transducer Technology

摘　　要：以缬氨霉素为活性物,以已二酸二辛酯为增塑剂,以四氢呋喃(以下简称THF)为溶剂,以铜丝为内导材料制作了聚氯乙烯(以下简称PVC)膜钾离子选择性涂丝电极,并自制了小型Ag/AgCl参比电极与之复合配对,系统地研究了该电极对的电化学性能。该电极对在25℃时对钾离子(含0.1mol/LNaCl)的线性范围为3.20×10^(-5)-1mol/L最低检测限为6.4×10^(-6)mol/L:斜率为58/40mV/pk;在浓度大于3.20×10^(-5)mol/L的K^+溶液中,响应时间少于10秒钟;电极回收率为96.7％～103.5％;该电极选择性能优良,电极寿命至少半年,已使用过480次而性能稳定。A potassium coated-wire ion-selective electrode and a mini-silver-silver chloride reference electrode have been studied. At thenormal temperature(25℃0.1mol/L), its linear limit to potassium is from 3.2×10-5 to 1mol/L, the detective limit is 6.40×10-6mol/L, the slope is 58.4mV/pk, This electrode has a very excellent selectivity to potassium ion. It has been used in the detection of criminal cases.

关 键 词：缬氨霉素 钾离子 选择电极 Ag/AgCl 参比电极 

分 类 号：O646.54[理学—物理化学]