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Calcium electrode and membrane and composition for use therein

  • US 3,932,233 A
  • Filed: 09/28/1973
  • Issued: 01/13/1976
  • Est. Priority Date: 10/02/1972
  • Status: Expired due to Term
First Claim
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1. An electrode for measuring the activity of calcium ions in a solution, comprisingan internal reference system, anda calcium di(aryl)phosphate, said calcium di(aryl)phosphate being positioned in the electrode so as to be contactable with said measured solution and to be in electrical contact with said internal reference system, the aryl groups of said calcium di(aryl)phosphate each carrying at least one carbon chain containing at least three carbon atoms, the aryl groups of said calcium di(aryl)phosphate further carry electrophilic substitution, and the electrophilic substitution is nitro or halogen substitution.

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