  We have computed the eta-prime pseudoscalar octet mass splitting using
staggered fermions on both dynamical and quenched gauge configurations. We have
used Wuppertal smeared operators to reduce excited state contributions. We
compare our results with the theoretical forms predicted by partially quenched
chiral perturbation theory in the lowest order. Using lattice volumes of size
16^3 x 32 with a^{-1}=2GeV we obtain results consistent with the physical
eta-prime mass. We also demonstrate that the flavor singlet piece of the
eta-prime mass comes from zero modes of the Dirac operator.
