PL
Oznaczono stężenia jonów magnezu i wapnia w próbkach wód pitnych województwa katowickiego i terenów przyległych oraz dostępnych na rynku wodach stołowych i mineralnych, stwierdzając w większości wód pitnych niższą od zalecanej zawartość jonów Mg2+ i w konsekwencji niekorzystną dla organizmu wartość stosunku stężeń molowych Ca2+/Mg2+.
EN
Magnesium and calcium concentrations in drinking water from selected locations of the Katowice region as well as in several commercial mineral and table waters were assessed. Monthly distributions of magnesium concentration were determined in samples collected daily at selected towns. Mg2+ concentrations were determined in the reaction with the Mann and Yoe agent, and those of Ca2+ in the reaction with metalphthalein. The results were compared with relevant literature data. Magnesium ion concentrations in tap water were usually lower than the recommended value of 30 mg/dm3 (1.23 mmol/dm3). Magnesium and calcium ion concentrations in selected table and mineral water grades were 2.9 to 386.9 mg Mg27dm3 and 20.5 to 215.6 mg Ca27dm3. Considering the enormous role of magnesium in the physiological processes, systematic monitoring of Mg2+ ion concentration in drinking water has been suggested. Drinking water mineralisation with Mg2+ ion is advisable, particularly in the areas where Mg2+ ion concentrations are extremely low.