EN
Levels of nitrates and nitrites were observed in pooled samples of milk from selected suppliers of the Košice dairy, and in dairy treated milk during certain months of the year. The average value of nitrates in examined (432) pooled samples of milk ranged from 1.84 to 4.58 mg of NaNO₃.1⁻¹, and in dairy-treated milk (72 samples), from 2.33 to 6.23 mg of NaNO₃.1⁻¹. In the both cases maximal values of nitrates were observed in April, and minimal values in January. With the exception of one pooled sample, all the examined milk samples complied with the Slovak Codex Alimentarius, where the highest values of nitrates and nitrites in some of the final products are fixed. The average value of nitrites in the examined samples of milk taken during the investigated period, amounted to 0.07 mg of NaNO₂.1⁻¹.