The volatilisation of ferrocene (Fc), dissolved in the ionic liquid N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, [C(4)mpyrr][NTf(2)], to the gas phase has been indirectly monitored by cyclic voltammetry and chronoamperometry. Simulation of the observed trends in concentration with time using a simple model allowed quantification of the process. Volatilisation of dissolved Fc under flowing wet and dry dinitrogen gas (N(2)) was found to be kinetically limited with a rate constant in the region of 2×10(-7) cm s(-1). The activation energy of diffusion for Fc was found to be 28.2±0.7 kJ mol(-1), while the activation energy of volatilisation of Fc from [C(4)mpyrr][NTf(2)] to dry N(2) was found to be 85±2 kJ mol(-1).