Methods and devices for conducting specific binding assays

Abstract

The invention provides methods for separating bound label from unbound label within an assay mixture, for predispensing assay reactants in self-contained assay vessels, as well as for detecting the presence and/or amount of an analyte within a fluid sample. In addition, a reusable detection vessel for use therein and with specific binding assays in general is disclosed. In the methods, generally an analyte within a sample is detected or measured by forming an assay mixture containing sample, analyte binding components and label, placing the assay mixture in contact with an immisable primary layer, subjecting the assay mixture to conditions that separate the analyte bound with binding components and label from unbound binding components and label, and subsequently detecting bound label.