  % An analysis is made of the particle composition (hadrochemistry) of the
final state in proton-proton (p-p), proton-lead (p-Pb) and lead-lead (Pb-Pb)
collisions as a function of the charged particle multiplicity ($\dNchdeta$).
The thermal model is used to determine the chemical freeze-out temperature as
well as the radius and strangeness saturation factor $\gamma_s$. Three
different ensembles are used in the analysis namely, the grand canonical
ensemble, the canonical ensemble with exact strangeness conservation and the
canonical ensemble with exact baryon number, strangeness and electric charge
conservation. It is shown that for high multiplicities (at least 20 charged
hadrons in the mid-rapidity interval considered) the three ensembles lead to
the same results.
