Chromatographic assay device and methods

G - Physics – 01 – N

Patent

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G01N 33/53 (2006.01)

Patent

CA 2577237

A chromatographic assay device for the analysis of an analyte in a liquid sample has a a proximal sample application zone and a distal test zone. The test zone contains a first ligand capable of binding with the analyte to form an analyte-ligand complex. The device also includes a spatially distinct reservoir containing a labeled reagent capable of binding to the analyte- ligand complex; an absorbent sink which is positioned to be capable of drawing the contents of the spatially distinct reservoir through the test zone; and structures for contacting the spatially distinct reservoir with the chromatographic medium so that the labeled reagent migrates from the reservoir to the absorbent sink, and thereby through the test zone to determine the presence or absence of the analyte. The device is used in a method for detecting analyte.

Un dispositif de dosage chromatographique destiné à l'analyse d'un analyte dans un échantillon liquide comprend une zone proximale d'application de l'échantillon et une zone distale d'essai. La zone d'essai contient un premier ligand susceptible de se lier à l'analyte pour former un complexe analyte/ligand. Ce dispositif comprend également un réservoir séparé dans l'espace, contenant un réactif marqué susceptible de se lier au complexe analyte/ligand; un puits absorbant positionné de manière à pouvoir attirer les contenus du réservoir séparé pour les faire passer à travers la zone d'essai; ainsi que des structures permettant de mettre en contact le réservoir séparé et le milieu chromatographique de telle sorte que le réactif marqué migre du réservoir vers le puits absorbant et, ainsi, à travers la zone d'essai en vue de déterminer la présence ou l'absence de l'analyte. Ce dispositif est utilisé dans le cadre d'un procédé de détection d'analytes.

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