“…This mass value is slightly higher and allowed for a wider working range up to 50.0. By comparison, Quinaia and Nobrega (33) determined Cr in milk by GFAAS obtaining a characteristic mass of 7.8 pg. The relative standard deviations obtained by the authors of this study for three different concentrations were within acceptable values of precision, not exceeding 11.8% and 7.8 pg.…”