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Method of making a device for determining analyte activity

  • US 4,468,271 A
  • Filed: 10/28/1982
  • Issued: 08/28/1984
  • Est. Priority Date: 10/28/1982
  • Status: Expired due to Fees
First Claim
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1. A method of making a device for determining the ionic analyte activity in a contacting sample of a liquid, said method comprising the steps of:

  • encapsulating a ribbon of porous material in a nonporous cover sheet to form a cover sheet element;

    applying a pair of solid electrodes in a spaced-apart relationship to an electrically insulative frame member;

    forming a pair of liquid access holes in said cover sheet element through said porous material, said liquid access holes having a common centerline;

    joining said cover sheet element to said frame member with said electrodes therebetween in an orientation such that each of said liquid access hole is aligned with a different electrode; and

    after said encapsulating step, using an embossing tool to stretch said cover sheet directly over and generally along said porous ribbon to form at least one substantially continuous stretch line.

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