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Reagent test strip

  • US 5,047,206 A
  • Filed: 03/11/1987
  • Issued: 09/10/1991
  • Est. Priority Date: 03/11/1987
  • Status: Expired due to Fees
First Claim
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1. A reagent test strip (10,10'"'"') comprising a support medium (12,12'"'"') including a handle portion (14,14'"'"') and a reagent support portion (16,16'"'"');

  • an insoluble reagent (18,18'"'"') fixedly adhered to said reagent support portion (16,16'"'"') defining a reagent surface (19,19'"'"') capable of quantitatively changing reflectance in the presence of a reactant to be quantitatively determined; and

    a cover (20,20'"'"') mounted on said support medium (12,12'"'"') and only over said reagent (18,18'"'"'), said cover (20,20'"'"') defining capillary chamber means (28,28'"'"') having two open ends (30,30'"'"') and a predetermined volume only over said reagent surface (19,19'"'"') for drawing a predetermined amount of liquid (32,32'"'"') into said capillary chamber means (28,28'"'"') and only over said reagent surface (19,19'"'"') to quantitatively react all of the liquid with said reagent (18,18'"'"') and quantitatively change the reflectance of the reagent surface, said cover (20,20'"'"') being the only structure over said reagent surface (19,19'"'"') and being spaced thereover only sufficiently to establish said predetermined volume for acting as a capillary.

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