PL
Oznaczono zawartość magnezu, cynku, żelaza i fosforu w pieczywie świeżym białym i ciemnym oraz pieczywie chrupkim. Na podstawie uzyskanych wyników oceniono realizację zalecanego dziennego zapotrzebowania na niezbędne składniki mineralne.
EN
The determination of mineral nutrients’ concentration was performed in 45 kinds of commercially available bread. The contents of Mg, Zn and Fe were analysed, after previous wet mineralization, by flame atomic absorption spectrometry (FAAS). Phosphorus was determined in the form of phosphormolybdate blue by colorimetry. Reliability of the procedure was checked by analysis of the certified reference materials. The trace metal contents in bread differed significantly. The highest levels of the analysed elements (Mg, P, Fe and Zn) were found in crispbread: 72.1, 431, 2.61 and 1.71 mg/100 g, respectively, of market product. Our data obtained indicate that the RDA for adult is best satisfied by 100 g of crispbread.