Abstract
The need for essential trace elements has been relatively well studied by growth infant. This study has been carried out to determine the concentration of essential trace elements (iron, zinc, copper, manganese and selenium) in the majority of infant formula commercialized in Spain. The infant formulas investigated include powder or liquid, such as dairy and soya formulas. A scrupulous and systematic approach was adopted to minimize every possible source of elemental contamination from the sampling step on wards. Digestion of samples was attempted with subboiling nitric acid in close system an microwave oven. The concentration of iron, zinc and copper was determined by Atomic Absorption Spectrometry while for manganese and selenium the Inductively Coupled Plasma Emission Spectrometry was used. The results obtained are similar to what was found by other authors in European and American formulae. The theoretical intake of lactating infant has been established with the different types of infant formulas studied and stages of lactation in relationship to the Recommended Dietary Allowances (RDAs) for trace elements. The investigated formulas provide an intake of zinc, manganese and selenium that don’t reach the RDAs to the first months of neonate life.
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