Internal calibration system for flow-through assays

G - Physics – 01 – N

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G01N 33/558 (2006.01) G01N 33/543 (2006.01)

Patent

CA 2471462

Abstract of the Disclosure A flow-through assay for detecting the quantity of an analyte residing in a test sample is provided. The flow-through assay contains a porous membrane that is in fluid communication with probe conjugates that contain a specific binding member and a detectable probe. The porous membrane also defines a detection zone and a calibration zone. The calibration zone includes two or more calibration regions (e.g., lines, dots, etc.) containing differing amounts of a binder that is configured to bind with the probe conjugates. As a result, calibration signals are generated that can be readily compared (visually, quantitatively, and the like) to a detection signal to determine the presence or quantity of an analyte in the test sample.

L'invention concerne un essai en écoulement continu permettant de détecter la quantité d'un certain analyte présente dans un échantillon d'essai. Cet essai en écoulement continu prévoit l'utilisation d'une membrane poreuse qui se trouve en communication fluidique avec des conjugués de sonde contenant un élément de liaison spécifique et une sonde détectable. Cette membrane poreuse, par ailleurs, définit une zone de détection et une zone d'étalonnage. Cette zone d'étalonnage comprend au moins deux régions d'étalonnage (par exemple, lignes, points, etc.) contenant différentes quantités d'un liant conçu pour se lier avec les conjugués de sonde. Il s'ensuit que des signaux d'étalonnage sont générés, qui peuvent être facilement comparés (visuellement, quantitativement, etc.) à un signal de détection afin de déterminer la présence ou la quantité d'un analyte dans l'échantillon d'essai.

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