Method of detecting an analyte for lateral flow immunoassay tests
AssigneeVarian, Inc.
InventorsSteven Sidwell, Steven Bachand
Life of this patent
Estimating the term…
Abstract
A visual perception of a colored site in an immunoassay device comprising a strip for enabling capillary migration of a fluid sample therealong, a labeled reagent disposed on the strip and formulated for suspension in the sample migrating therepast and a captive reagent immobilized on the strip in a path of sample migration and formulated to bind to is enhanced by changing a color of the strip to the color which is complimentary to the colored site.
Claims8
A method for enhancing visual perception of colored site in an immunoassay device, the device comprising a strip for enabling capillary migration of a fluid sample therealong, a labeled reagent disposed on the strip and formulated for suspension in the sample migrating therepast and a captive reagent immobilized on said strip in a path of sample migration and formulated to bind to said labeled reagent to form a visible colored site on the strip, said method comprising:
- providing a transparent film and disposing said film over said strip;
- and
- dyeing said transparent film to a color which is complimentary to said colored site.
A method for enhancing visual perception of colored site in an immunoassay device, the device comprising a white porous nitrocellulose membrane for enabling capillary migration of a fluid sample therealong, a labeled reagent disposed on the membrane and formulated for suspension in the sample migrating therepast and a captive reagent immobilized on said strip in a path of sample migration and formulated to bind to said labeled reagent to form a visible colored site on the strip, said method comprising:
- changing the color of the white porous nitrocellulose membrane to color which is complimentary to said colored site by adhering a colored transparent film to said membrane.
Dependencies are inferred from the claim text.