| abstract |
(57) Abstract: An apparatus (10) for extracting an analyte from a liquid sample is sandwiched between a microcolumn (12) having a particulate medium therein, and two compressed layers (18a, 18b). Media. Preferably, the compression layer comprises binder-free glass fibers held in the microcolumn by upper and lower polypropylene meshes (16a, 16b). Preferably, the microcolumn has a flat bottom (50) with a centrally located outlet (51). |