Patent ID: 8110403
Filing Date: 2012-02-07
Classification: G01N,Y10T

Abstract:
1. An immunoassay method which comprises: (a) applying simultaneously or sequentially onto a chromatographic insoluble carrier a plurality of different test substances and first binding substances each labeled with particulate labels having different preselected particle sizes but having a same optical characteristic, wherein the first binding substances each specifically bind to the corresponding test substances; (b) capturing complexes of the test substances and the first binding substances labeled with particulate labels by second binding substances each specific for the corresponding test substances in different reaction portions of the chromatographic insoluble carrier, wherein each of the second binding substances is immobilized in each of the different reaction portions; and (c) measuring the same optical characteristic of the particulate labels, so as to simultaneously detect the plurality of different test substances, wherein the plurality of different test substances have different detectable concentration ranges.