Display omitted •Inkjet system used to renew a liquid electrode surface.•Low-viscosity carbon fluid prepared with spherical graphite powder.•First trial of inkjet polarography. A single nozzle piezoelectric inkjet device was introduced for polarography using a dropping carbon fluid electrode (DCFE). The viscosity of the carbon fluid prepared by mixing a spherical graphite powder and a perfluoroalkane oil was low enough for it to be ejected by the inkjet system. The periodic renewal of the DCFE was achieved at a frequency of 1 Hz with a constant droplet size (about 2 mm). A polarogram of ferrocenecarboxylate with a limiting current was observed.