[Stability of ascorbic acid at it contract alloy in presence of fluoride ions].

Aluminum utensils are considered as potentiAl source of dietary Aluminums. Report suggests that acidic food cooked or stored in presence of Aluminum foil contain high concentrations of Aluminum. Study on fluoride induced leaching of Aluminum from different pH. Higher concentrations of fluoride and lower pH enhance Aluminum leaching to a great extent. Evidence was obtained showing that after a 2-dyas exposure at room temperature in presence of floride NaF, Aluminum foil liberated nearly 1 mg/l of Aluminum, compared with less than 0.04 mg/l in absence of fluoride. There is reason to believe that in experiments with ascorbic acid NaF prevents the oxidation of ascorbic acid.