Patent ID: 8349159
Filing Date: 2013-01-08
Classification: C07K

Abstract:
1. A device for selective preconcentration/detection of charged analytes contained in an electrolyte comprising: at least two reservoirs separated by at least one rectilinear preconcentration micro channel, without intersection between two ends of the preconcentration microchannel, and with a lengthwise axis X, at least one controllable voltage source configured to generate a potential difference between the ends of the at least one preconcentration microchannel; and means for generating a controllable pressure that are associated with at least one of the reservoirs and are able to generate a pressure gradient between the two ends of the at least one preconcentration microchannel, wherein the at least one preconcentration microchannel has, in its median part, at least one first portion having a constant surface area to volume ratio charge followed by a second portion having means configured to generate at least one change in the surface area to volume ratio charge relative to that of the first portion.