Yet, the convergence and accuracy of a MC-based molecular simulation depends greatly on the ability to carry out insertion or deletion of ions, in order to describe phenomenan like the adsorption of electrolytes at interfaces or in porous materials, without an explicit description of the electrolyte reservoir (which is computational expensive, and induces finitesize effects). The design of adapted MC moves that have higher probabilities of particle insertion or deletion in dense fluid is therefore required, 2 for which a chemical potential is imposed and dictate composition evolution in response to this chemical potential. A large number of biasing techniques have been developed to this end, and without attempting an exhaustive review of this vast literature, we summarize below some of the most relevant works to provide the reader with context for our own work.