Immunochromatographic assay
First Claim
Patent Images
1. An assay for determining the presence or concentration of an analyte in a fluid test sample which comprises:
- a) providing an immunochromatographic test strip having a non-porous receiving member of a hydrophobic material in direct fluid communication with a reagent region of an absorbant material through which the fluid test sample and reagents carried therein can flow by capillarity and which reagent region contains a detection site for detecting the presence or concentration of the analyte, b) applying the fluid test sample to the receiving member, so that a portion of the fluid test sample is in direct contact with the absorbant material of the reagent region of the immunochromatographic test strip, and determining the presence or concentration of the analyte in the fluid test sample by correlating a detectable response in the reagent region with such presence or concentration.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a device and method for carrying out an assay for an analyte in a fluid test sample by immunochromatography. The device involves a strip having a non-porous receiving member of a hydrophobic material in direct fluid communication with a reagent region of an absorbent material through which the fluid test sample can flow by capillarity. By applying the fluid test sample to the non-porous hydrophobic receiving member rather than directly to the absorbent material the reliability of the assay is enhanced.
55 Citations
14 Claims
-
1. An assay for determining the presence or concentration of an analyte in a fluid test sample which comprises:
-
a) providing an immunochromatographic test strip having a non-porous receiving member of a hydrophobic material in direct fluid communication with a reagent region of an absorbant material through which the fluid test sample and reagents carried therein can flow by capillarity and which reagent region contains a detection site for detecting the presence or concentration of the analyte, b) applying the fluid test sample to the receiving member, so that a portion of the fluid test sample is in direct contact with the absorbant material of the reagent region of the immunochromatographic test strip, and determining the presence or concentration of the analyte in the fluid test sample by correlating a detectable response in the reagent region with such presence or concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A test strip for the determination of an analyte in a fluid test sample which comprises a base member of a non-porous, hydrophobic material which base member has on its surface a pad of absorbent material through which the fluid test sample and reagents carried therein can flow wherein the base member has sufficient surface area which is not covered by the pad of absorbent material for application of the fluid test sample directly to the base member.
Specification