Zawartosc wybranych skladnikow mineralnych [Ca, Mg, Zn, Cu, Fe] w calodziennych racjach pokarmowych mlodziezy starszej: porownanie wynikow analitycznych i obliczeniowych

Dokonano oceny podaży wybranych składników mineralnych w całodziennych racjach pokarmowych (CRP) młodzieży: pensjonariuszy dwóch domów dziecka z Legnickiego Okręgu Przemysłowego oraz uczniów dwóch szkół żywionych w stołówkach. Podaż składników mineralnych określono dwiema metodami: na podstawie oznaczeń analitycznych w pobranych CRP oraz metodą obliczeniową wykorzystując dane z raportów magazynowych.

The content of calcium, magnesium, zinc, copper and iron in daily food rations of adolescents served in two residential centres in Copper Basin Legnica region and two high schools in Poznań were studied. The content of minerals was determined by two independent methods: chemical analysis and calculation based upon food composition tables. It was found that the calculated results were markedly higher, suggesting that daily meals covered recommended allowances for minerals established for the adolescents group. However, the analytical results were 10% lower on average, but in the case of zinc and magnesium they did not even reach 50% of norms showing that the daily food did not provide sufficient amounts of minerals for adolescents. Moreover, analysis of regression showed a significant correlation for the magnesium, iron, zinc and copper content obtained by the two methods which allowed to calcalate empirical formulae that may help to establish the content of these elements in daily food with the use of the FOOD computer program.