Disclosed is a packet disinfection apparatus. The apparatus has a packet disinfection electrode assembly for generating plasma inside a package (16). The electrode assembly includes at least two solid state conductive elongate electrodes (1) distributed about a contact surface (17). A first one of the two electrodes (1) is insulated and an electrically conductive region of a second one of said electrodes (1) is exposed near the contact surface (17). The at least two solid state conductive electrodes (1) are configured to receive an alternating voltage to enable generation of ozone between the electrodes (1) such that, in use, applying the electrodes (1) to a package (16) converts oxygen to ozone within said package (16).
