초록 ▼

An apparatus for extracting an analyte from a liquid sample, comprises a microcolumn having a microparticulate media therein, the media being sandwiched between two compression layers. Preferably, the compression layers comprise a binder-free glass fiber, held in the microcolumn by upper and lower p

An apparatus for extracting an analyte from a liquid sample, comprises a microcolumn having a microparticulate media therein, the media being sandwiched between two compression layers. Preferably, the compression layers comprise a binder-free glass fiber, held in the microcolumn by upper and lower polypropylene mesh.

대표청구항 ▼

Apparatus for extracting an analyte from a liquid sample comprising: a) a container having an entrance, an exit, and a passage therebetween for passage of a liquid sample containing an analyte therethrough; b) within the passage, a thin layer of microparticulate extraction media for extracting the a

Apparatus for extracting an analyte from a liquid sample comprising: a) a container having an entrance, an exit, and a passage therebetween for passage of a liquid sample containing an analyte therethrough; b) within the passage, a thin layer of microparticulate extraction media for extracting the analyte from the liquid sample, wherein: (i) the extraction media layer has a top surface, a bottom surface, and a peripheral edge, (ii) the extraction media has a particle size of less than 20 microns, (iii) the ratio of the effective diameter of the extraction media layer to the distance between its top and bottom surfaces is at least 10, and (iv) the extraction media layer is oriented in the passage so that liquid flows through the extraction media layer from its top surface to the bottom surface; c) an upper compression layer at the top surface of the extraction media layer and a lower compression layer at the bottom surface of the extraction media layer, the two compression layers pressing the extraction media therebetween, the compression layers being sufficiently porous that the liquid sample flows therethrough, the compression layers being formed of a flexible, hydrophilic, microfiber material and having a pore size less than the particle size of the extraction media; d) an upper mesh flow distributor above the upper compression layer for distributing flow of the liquid sample uniformly to the extraction media layer top surface; and e) a lower mesh flow distributor below the lower compression layer.