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Diagnostic membrane containing fatty acid sarcosinate surfactant for testing oral fluid

  • US 6,194,224 B1
  • Filed: 07/27/1998
  • Issued: 02/27/2001
  • Est. Priority Date: 07/27/1998
  • Status: Expired due to Term
First Claim
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1. A diagnostic test strip comprising a bibulous matrix having:

  • a sample receiving zone for receiving a liquid specimen of oral fluid suspected of containing a particular analyte, reagent chemistry located for contact with the sample for detecting the particular analyte, and spaced from the sample receiving zone in a sample migration direction a detection zone for determining the presence of said particular analyte by providing a detectable change observable in the detection zone, wherein the sample migrates between the sample receiving zone and the detection zone, and wherein the sample receiving zone contains a sodium myristol sarcosinate surfactant.

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