The metallicities of UM 151, UM 408 and A 1228+12 revisited

We present the results of new spectrophotometry and heavy element abundance determinations for 3 dwarf galaxies UM 151, UM 408 and A 1228+12 (RMB 132). These galaxies have been claimed in the literature to have very low metallicities, corresponding to $\rm log(O/H)+12 \le$ 7.65, that are in the metallicity range of some candidate local young galaxies. We present higher S/N data for these three galaxies. UM 151 and UM 408 have significantly larger metallicities: $\rm log(O/H)+12 =$ 8.5 and 7.93, respectively. For A 1228+12 our new 7.73 is close to that recalculated from earlier data (7.68). Thus, the rederived metallicities allow us to remove these objects from the list of galaxies with $Z \lesssim 1/20~Z$ $_{\odot}$