钾离子选择电极国外以缬氨霉素为活性物质者居多,其对钠离子选择性较冠醚类钾电极为好。国内厂商生产二叔丁基二苯并30-王冠-10及二甲基二苯并30-王冠-10钾电极,对高钠试样中钾的测定不甚相宜。我们以缬氨霉素制备了钾电极,经与美国Orion93 Potassium ion selective electrode Foreign to valinomycin as the active substance are mostly sodium ion selectivity than the crown ether potassium electrode is better. Domestic manufacturers di-tert-butyl dibenzo-30 crown-10 and two dibenzo-30 crown-10 potassium electrode, potassium in the high sodium sample is not suitable for the determination. We have prepared potassium electrode valinomycin, with the United States Orion93