EN
The experiment was conducted in order to determine the concentration of fluorine in cow's milk and human breast milk. Milk samples were tested for fluoride concentration. After fractioning, free fluorine and protein-bound fluorine was tested by using ion-selective electrode. It was determined that the concentration of fluorine in tested human breast milk was higher than in cow's milk. The fluorine appeared mainly in free form and only a small fraction was bound to proteins. Complete concentration of fluorine was higher in human breast milk than in cow's milk.