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External dried-reagent control for analytical test devices

  • US 6,451,607 B1
  • Filed: 03/21/2000
  • Issued: 09/17/2002
  • Est. Priority Date: 05/07/1998
  • Status: Expired due to Fees
First Claim
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1. A control device for use in performing a positive control test of a solid-phase analytical test device, said solid-phase analytical test device being one that comprises an indicator and that detects the presence of an analyte in a liquid sample by a change in said indicator, said control device comprising:

  • a solid support having a dry control reagent adhering thereto and no components that are chemically reactive with said control reagent, said reagent being arranged on said solid support in a manner permitting removal of said reagent from said support by a wet transfer implement which is either a swab or a sponge, and said reagent being either water-soluble or sufficiently hydrophilic to cause said reagent to be transferred to said wet transfer implement upon contact of said wet transfer implement to said reagent, said reagent being selected as one which when applied to said test device by said wet transfer implement causes an indicator change that is substantially the same as that which occurs in the presence of said analyte.

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