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Calcium ion-selective electrodes and membrane for use therein

  • US 4,271,002 A
  • Filed: 12/26/1979
  • Issued: 06/02/1981
  • Est. Priority Date: 06/27/1979
  • Status: Expired due to Term
First Claim
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1. A membrane for use in the determination of calcium ion concentration in an aqueous solution, said membrane being of the type comprising a calcium ion selective component and a carrier material, characterized in that said calcium ion selective component is a compound having a formula ##STR7## wherein X and Y are selected from a group consisting of aryl, alkyl(aryl) alkenyl, cycloalkenyl, and alkynyl radicals wherein said alkyl moiety of said alkyl(aryl) radical consists of 1-12 carbon atoms;

  • each alkenyl and alkynyl moiety of said alkenyl(aryl) and alkynyl(aryl) radicals, respectively, consists of 2-12 carbon atoms;

    each aryl moiety consists of 6, 10, 12, or 14 carbon atoms; and

    each alkyl, cycloalkyl, alkenyl, cycloalkenyl, and alkynyl radical consists of 6 to 14 carbon atoms; and

    Z is selected from a group consisting of alkyl radicals containing 1-12 carbon atoms;

    alkenyl and alkynyl radicals containing 4-12 carbon atoms; and

    cycloalkyl and cycloalkenyl radicals containing 6 to 12 carbon atoms.

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