Patent ID: 6753189
Filing Date: 2004-06-22
Classification: G01N,Y10S

Abstract:
An apparatus for detecting the presence of a detectable material in a sample comprising:a fluid application section for contacting said sample; a reaction reagent section, containing particles having antibodies which bind to the detectable material but which do not affect detection of said detectable material when not bound to said detectable material, and marking elements movably contained therein, said reaction reagent section connected to said fluid application section such that said sample moves from said fluid application section to said reaction reagent section; wherein said marking element comprises antibodies specific to the detectable material labeled with a detectable marker; a porous carrier connected to said reaction reagent section such that said sample moves from said reaction reagent section to said porous carrier; wherein a reaction product is formed from binding of said detectable material with both said marking elements and said particles when said detectable material is present in said sample; and a catching section in said porous carrier made from a material having a pore size smaller than a size of said reaction product, such that chromatographic movement of said marking elements not bonded in said reaction product is permitted through said catching section and chromatographic movement of said reaction product is restricted, because of the size of said reaction product, thereby causing said reaction product to be retained by said catching section.