The present invention relates to a Micro-Free Flow Electrophoresis chip for analyzing or separating a sample including a pile (1) comprising at least two plates (2A, 2B), a sheet (3) uniformly disposed between the two plates (2A, 2B), clamping means, each sheet (3) comprising at least two inlet ports (11) for entry and at least one outlet port (12) for exit of a first fluid electrode and a second fluid electrode, the first and second fluid electrodes applying an electric field to a separation chamber (31).
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