Patent ID: 9568404
Date: 2017-02-14
CPC Classifications: G01N

Claim:
1. A device for biomolecule analysis, said device comprising: a filter membrane having an upper surface and a lower surface a sample well comprising a top opening for sample addition and a bottom opening, wherein the bottom opening of said sample well is disposed on the upper surface of said filter membrane and defines a detection zone, wherein the cross section of the detection zone has a circular shape, and a diameter from about 0.5 mm to 7 mm and a height from about 0.2 mm to about 2 mm; a porous absorbing plug having a surface, wherein the surface of the absorbing plug is in contact with the filter membrane and wherein the absorbing plug is a hydrophilic porous material having from about 30 to about 90 percent pore volume, with liquid absorbing capacity from about 10 μl to about 50 ml; and a housing, wherein the filter membrane, the sample well and the absorbing plug are disposed in said housing.