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化学学报
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化学学报 ›› 1995, Vol. 53 ›› Issue (8): 801-804. 上一篇    下一篇

研究论文

KTiOPO4单晶膜钾离子选择性电极的研究

刘学勇;马长勤;蒋德华;沈静兰   

  1. 山东大学化学学院
  • 发布日期:1995-08-15

Study on potassium-selective electrode using KTiOPO4 single crystal membrane as an ion carrier

LIU XUEYONG;MA CHANGQIN;JIANG DEHUA;SHEN JINGLAN   

  • Published:1995-08-15

PDF

520

被引次数

5

本文采用KTiOPO4单晶薄片作为离子活性传感膜, 制备了钾离子选择性电极。20℃时, 其线性响应范围为1.2×10^-^5～1.0mol.dm^-^3氯化钾溶液, 平均响应斜率为58mV/-lgak, 对钠离子的电位选择性系数为4.0×10^-^4。该电极的优点是电极斜率受酸度变化影响小, 稳定性和重现性好, 寿命长。

关键词: 离子选择电极, 单晶, 光学材料, 磷酸氧钛钾, 电极斜率, 电位选择系数

A new potassium ion selective electrode is proposed, in which the KTiOPO4 single crystal membrane is used as the electroactive material. The slope of response is determined to be 58mV/-lgak by means of computer fitting. The selective coefficients in relation to Na^+ is 4.0 ×10^-^4. The advantages of this electrode are that its slope can be hardly influenced by the variation of the pH value; its stability, repeatability and its long ilfetime as well.

Key words: ION SELECTIVE ELECTRODE, SINGLE CRYSTALS, OPTICAL MATERIAL

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