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Reduction of gentisic acid interference in analytical elements

  • US 4,184,923 A
  • Filed: 11/03/1977
  • Issued: 01/22/1980
  • Est. Priority Date: 11/03/1977
  • Status: Expired due to Term
First Claim
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1. In an element for the analysis of a predetermined analyte in an aqueous liquid which may contain gentisic acid, said element comprising a carrier permeable to gentisic acid and permeable to said predetermined analyte, said carrier containing reagents comprising:

  • (a) an enzyme capable of catalyzing the oxidation of said predetermined analyte to a peroxide,(b) a substance having peroxidative activity, and(c) an indicator composition dispersed in an organic solvent and oxidizable by said peroxide in the presence of said substance having peroxidative activity to produce a detectable product;

    the improvement wherein said organic solvent comprises a compound into which gentisic acid is not preferentially partitioned from the aqueous liquid.

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