[Inorganic anions with a potential goitrogenic effect in drinking water supply for humans and animals].

The levels of inorganic anions (NO3-, NO2-, SO(2-)4, F- and HPO(2-)4 with the following average values (mg/l) were determined isotachophoretically in 82 samples of potable water for humans and animals: 39.7 +/- 53.1 for nitrates, min. 0.0 - max. 363.3; 0.206 +/- 0.954 for nitrites, min. 0.0 - max. 7.82; 37.5 +/- 32.4 for chlorides, min. 0.0 - max. 137.9; 74.2 +/- 74.1 for sulfates, min. 4.2 - max. 369.2; 0.208 +/- 0.138 for fluorides, min. 0.032 - max 0.605 and 0.350 +/- 1.197 for phosphates, min. 0.0 - max. 17.4 (Tabs. I-IV). Within the set of samples examined, 22.0 of samples exceeded the limit value of nitrites; the respective values of nitrites, chlorides, sulfates and phosphates were 13.4, 6.1, 2.4 and 1.2. None of the samples exceeded the limit value of fluorides. 34.1% of samples complied with the value recommended by the standard for nitrites. Nitrate concentrations in drinking water for cows were compared with urine iodine content in some cows in the total of 398 urine samples from 14 iodine content in urine was recorded at some localities. Correlation analysis proved this relationship to be statistically highly significant (P < 0.01), Tab. VIII. The values of nitrate and iodine contents at DYJ locality are expressly different (Tab. VII).