  A method is developed to consistently satisfy the Gibbs equilibrium
conditions between the quark-gluon and hadronic phase, although each phase has
been formulated in separate grand canonical partition functions containing
three quark flavours. The sector in the space of thermodynamic variables, where
the transition takes place, is restricted to a curve, according to the phase
diagram of QCD. The conservation laws of quantum numbers are also imposed on
the transition curve. The effect of the inclusion of the newly discovered
pentaquark states is considered. The freeze-out conditions of S+S, S+Ag (SPS)
and Au+Au (RHIC) are found compatible with a primordial QGP phase, but the
conditions indicated by Pb+Pb (SPS) are not.
