The use of microfluidic systems in the electrochemical detection of target analytes

microfluidic for detecting a target analyte in a fluid sample device, comprising: a) a solid support (5); b) a well (40) of sample manipulation, formed in said solid support to receive and store said sample; c) A sample inlet port (10) for said microfluidic device; d) a first microchannel (15) formed in said solid support extending between said well of sample handling and input port said sample; e) a detection module (30) including a detection well formed in said the solid support and a detection electrode (35) located in said detection well, said detection electrode being provided by a self-assembled monolayer and binding ligand; and, f) a second microchannel (20) formed in said solid support and extending between said well of sample handling well and said detection, for the flow of said fluid sample between them.