Acta Chimica Sinica ›› 1983, Vol. 41 ›› Issue (4): 371-374. Previous Articles     Next Articles

Original Articles

离子缔合型离子选择电极的研究 I: PVC膜铬(VI)离子选择电极的研制的和应用

丰达明;陈诚之   

  1. 冶金工业部广州有色金属研究院
  • 发布日期:1983-04-15

A study on ion-selective electrodes based on ion associates I: A new Cr(VI)-selective electrode of PVC matrix membrane

FENG DAMING;CHEN CHENGZHI   

  • Published:1983-04-15

A new Cr(VI)-selective electrode of PVC membrane based on triheptyl dodecyl ammonium iodide is described. The response of the electrode is Nernstian for Cr(VI) concentration down to 2X10-6M in 0.03-0.13N HF solution. Limit of detection is 5X10-7M. The plot of logarithms of selectivity coefficients vs. z/γ of various anions is essentially linear with a correlation coefficient of -- 0.88. Applications of the electrode in determination of total Cr in steels and copper alloys, and Cr(VI) in waste-water from chromium electroplating are reported.

Key words: ION SELECTIVE ELECTRODE, POLYVINYL CHLORIDE, MEMBRANE ELECTRODES, CHROMIUM ION

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