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化学学报
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化学学报 ›› 1989, Vol. 47 ›› Issue (9): 914-917. 上一篇    下一篇

研究论文

双冠醚钾电极的研究 II: 酮型、醇型和烃型双(4'-苯并-15-冠-5)为载体的钾离子选择电极

吴国梁;王凤琴;沈彩娣;黄枢;田宝芝   

  1. 中国科学院青海盐湖研究所;四川大学化学系
  • 发布日期:1989-09-15

Studies on potassium ion-selective electrodes with bis-crown ethers as neutral carrier II: Response performance of potassium electrodes based on alkanedioyl, polymethylene and α,α'dihydroxypolymethylene bis-crown ethers

WU GUOLIANG;WANG FENGQING;SHEN CAIDI;HUANG SHU;TIAN BAOZHI   

  • Published:1989-09-15

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493

本文报道12种酮型, 醇型和烃型双(4'-苯并-15-冠-5)PVC膜钾离子选择电极的性能。

关键词: 烷烃, 冠式化合物, 离子选择电极, 聚氯乙烯, 苯 P, 膜电极, 钾离子, 醇, 酮, 电极寿命

K+-selective PVC membrane electrodes based on 12 alkanedioyl, polymethylene, and a,a'-dihydroxypolymethylene bis-crown ethers (I, I, III, n = 3-8) with 2-nitrophenyl octyl ether as plasticizer were prepared and their characteristics were investigated. Response performance of these electrodes indicated that polymethylene bis(4'-benzo-15-crown-5) and alkanedioyl (4-benzo-15-crown-5) with longer carbon chain (n ?) are feasible for the neutral carrier of K+-selective electrode. At 25癈, in pure KCl solution, the linear response ranges of these electrodes are from 2 ?10-5 to 10-1 mol.dm-3, KK+,Na+pot ? ?10-4 and KK+,Ca+pot ~10-2. The response performance of the electrodes based on a,a'-dihydroxypolymethylene and alkanedioyl with shorter carbon chain bis-crown ethers decreased with the lowering of the temperature of solution, the slopes are less than 50 mV/pK+ at 15癈.

Key words: ALKANE, CROWN ETHER COMPOUNDS, ION SELECTIVE ELECTRODE, POLYVINYL CHLORIDE, BENZENE P, MEMBRANE ELECTRODES, POTASSIUM ION, ALCOHOL, KETONE, ELECTRODE LIFE TIME

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