초록 ▼

A method and apparatus for separation and filtration of particulate matter of sediment from a liquid sample. The system includes a unitary filter assembly having an intermediate fibrous filter material disposed between two layers of porous, relatively rigid plastic material. The unitary filter assem

A method and apparatus for separation and filtration of particulate matter of sediment from a liquid sample. The system includes a unitary filter assembly having an intermediate fibrous filter material disposed between two layers of porous, relatively rigid plastic material. The unitary filter assembly is pressed axially toward the closed end of a sample container, such as a test tube, resulting in an upward flow of filtrate with compaction and retention of the particulates between the unitary filter assembly and the closed end of the sample container. The filter assembly is free of orientation criticality and may be readily adapted to automated handling in multiple tests or assays.

대표청구항 ▼

A method of filtration for immunoassay purposes comprising the steps of: providing a receptacle having an open end and a closed end, placing a quantity of filterable liquid material into the receptacle, inserting a unitary filter assembly comprising a first and second support disc of porous, relativ

A method of filtration for immunoassay purposes comprising the steps of: providing a receptacle having an open end and a closed end, placing a quantity of filterable liquid material into the receptacle, inserting a unitary filter assembly comprising a first and second support disc of porous, relatively rigid material into the receptacle, with said disc closely fitting the inside wall of the receptacle; and a fibrous filter material having a predetermined pore size disposed between said first support disc, and said second support disc; moving said filter assembly toward and through the liquid in said receptacle thereby to cause said liquid and components thereof of a size less than said pore size to pass through said discs to provide a filtrate at a location thereabove while components of size greater than pore size are compacted toward the closed end of the receptacle, wherein the pore size of the first and second support discs is at least equal to the pore size of the fibrous filter material.