A SYRINGE-PLUG AND A CARTRIDGE FOR ANALYTIC ASSAYS COMPRISING SUCH A SYRINGE-PLUG

A syringe-plug (1, 1') for placement in a sample chamber (10) inlet (13) of a cartridge (11) for analytic assays, the syringe-plug comprising a tank (2) pre-filled with a liquid, the tank (2) having a proximal end (2a) and a distal end (2b), the proximal end (2a) of the tank (2) being closed by a piston (3) movable towards said distal end (2b), wherein the distal end (2b) of the tank (2) is closed by a pierceable membrane (6) and the piston (3) is provided on its distal end (2b) side with a rod (4) having a piercing part (5) at its end, enabling to pierce the membrane (6), wherein the proximal end (2a) of the tank (2) is provided with a plug part (7, 7') adapted to seal the inlet (13) of the sample chamber (10) against the liquid, the plug part (7, 7') being equipped with at least temporarily gas-permeable sealing means (7b, 7c, 7d, 7e, 7f).A cartridge (11) for analytic assays comprising a sample chamber (10) integrated with a microfluidic system (9), the microfluidic system (9) being fed with a sample of analyte (S) and with a separating liquid (L), the sample chamber (10) having an inlet (13) adapted for insertion of the sample of analyte (S), and the cartridge further comprising a syringe-plug (1, 1').