Final abundance of ammonium (${\mathrm{N}\mathrm{H}}_4^{+}$), ammonia (NH₃), methane (CH₄), nitrate (${\mathrm{N}\mathrm{O}}_3^{-}$) and nitrite (${\mathrm{N}\mathrm{O}}_2^{-}$), nitrous oxide (N₂O), and nitric oxide (NO) in 120 min spark experiments with different gas compositions (see Table 1 for individual gas compositions). Results from experiments with (blue) and without (orange) water are shown separately. If no concentrations were measurable, the detection limit is indicated with an arrow. The data presented here are based on averages of multiple measurements with the error bars representing the individual standard error of the mean $(\sigma /\sqrt{N})$. Data for NH₃ is calculated from aqueous ${\mathrm{N}\mathrm{H}}_4^{+}$ and not measured directly. Measurements of methane abundance are within 1σ of 0 (red line) and are therefore shown without error bars and semi-transparent.