title: Examination of the iron, copper and zinc contents in the daily menu of teen-agers.
abstract: The Fe, Cu- and Zn contents of the daily menu of teen-agers were examined over two years with 124 samples taken. The samples were homogenized, subsequently dried at 104 degrees C finally incinerated at 480 degrees C. The ash was dissolved by heating with 3 N HCl. Determination of the three micro-elements was carried out by atomic absorption spectrophotometry. It was found that the daily intake of the micro-elements investigated is much below the value proposed by FAO/WHO, however, somewhat higher than the calculated Hungarian data. According to measurements, the average daily micro-element intake is 10.77 +/- 4.42 mg for iron; 1.23 +/- 0.65 mg for copper and 9.44 +/- 2.39 mg for zinc. With enumeration of iron, copper and zinc sources, dietary recommendations are given in order to increase the average values.
mesh_terms: D000293:Adolescent; D003300:Copper / Q000032:analysis*; D004032:Diet; D005260:Female; D005504:Food Analysis; D006801:Humans; D006814:Hungary; D007501:Iron / Q000032:analysis*; D008297:Male; D012621:Seasons; D015032:Zinc / Q000032:analysis*
chemical_list: D003300:Copper; D007501:Iron; D015032:Zinc