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Ion specific test method

  • US 4,734,375 A
  • Filed: 05/12/1983
  • Issued: 03/29/1988
  • Est. Priority Date: 05/27/1980
  • Status: Expired due to Term
First Claim
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1. A method useful for the determination of a specific ion in an aqueous test sample, comprising the steps of:

  • (a) adding a counterion reporter substance to an aqueous test sample,(b) contacting the counterion containing sample with a surface of a test means comprising a substantially nonpolar, nonporous, polymer carrier matrix incorporated with an ionophore capable of selectively forming a complex with a specific ion to be determined in the sample,(c) removing any unassociated counterion from the surface of the test means, and(d) determining a detectable optical response associated with the test means.

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