How far the Ion-Selectivity Should be Improved; a task Oriented Limit of Ion-Selective Electrode Design

Géza Nagy, Klára Tóth, Ernö Pungor

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A simple formula is proposed for the definition and the calculation of the highest acceptable selectivity coefficient values of ion-selective electrodes. On the basis of the formula which is based on the consideration of the precision of the direct Potentiometrie measuring techniques one can easily decide whether the selectivity of an electrode is sufficient or not for solving a well defined analytical task correctly. On the other, hand it indicates clearly for ion-selective electrode developing teams or manufacturers how far the ion-selectivity of an electrode should be improved for a certain type of analytical application. Characteristic selectivity values for a few concrete analytical sample types are given in table together with the selectivity coefficients of the corresponding, existing ion-selective electrodes.

Original languageEnglish
Pages (from-to)1391-1396
Number of pages6
JournalAnalytical Letters
Volume26
Issue number7
DOIs
Publication statusPublished - Jul 1 1993

Keywords

  • ion-selective electrode design
  • ion-selectivity
  • practical equation for ion-selectivity
  • selectivity coefficient

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Spectroscopy
  • Clinical Biochemistry
  • Biochemistry, medical
  • Electrochemistry

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