| 摘要 |
A device for selective preconcentration/detection of charged analytes contained in an electrolyte having at least two reservoirs separated by at least one rectilinear microchannel with no lengthwise axis X intersection and having at least one controllable voltage source configured to generate a potential difference between the ends of the rectilinear microchannel. The device has means for generating a controllable pressure that is associated with at least one of the reservoirs and is able to generate a pressure gradient between the two ends of the microchannel. The microchannel has, in its median part, means that are configured to generate at least one change in the surface area to volume ratio charge, the device configured to selectively concentrate the charged analytes in the median part of the microchannel upstream and/or downstream of the means configured to generate at least one change in the surface area to volume ration charge.
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