DEVICE FOR THE SELECTIVE PRECONCENTRATION/DETECTION OF CHARGED ANALYTES CONTAINED IN AN ELECTROLYTE, AND RELATED METHOD

摘要

The invention pertains to the field of material research or analysis using electric means, and more particularly relates to a device for the selective preconcentration/detection of charged analytes contained in an electrolyte, said device comprising at least two tanks separated by at least one preferably rectilinear micro-channel without any intersection of the X longitudinal axis and including at least one controlled voltage source capable of generating a potential difference between the ends of the rectilinear channel, wherein said device is characterised in that it comprises a means for generating a controlled pressure, associated with at least one of the tanks and capable of generating a pressure gradient between the two ends of the micro-channel, and in that the latter includes in the middle portion thereof a means capable of generating at least one variation in the volumetric surface charge, the device being capable of selectively concentrating the charged analytes in the middle portion of the channel upstream and/or downstream from said means.