Patent · US Expired

Alkali metal ion-selective compositions and elements and a method of using same

US4504368A · kind A · utility

18Cited by
7References
22Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 18, 1983
Grant dateMar 12, 1985
Priority date—
Expiry dateJul 18, 2003

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N27/3335
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Ion-selective compositions which comprise an ionophore, a compound capable of solvating the ionophore and a supporting matrix are disclosed. The ionophores useful in these compositions are certain crown ethers. These ion-selective compositions are particularly useful in ion-selective membranes and electrodes which are capable of selectively transporting a first ion in preference to a second ion. Such compositions, membranes and electrodes are useful for potentiometric measurement of alkali metal ions, e.g. lithium, sodium and potassium, in aqueous solutions, e.g. biological fluids. Dry-operative electrodes using these ion-selective compositions as membranes are also disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.