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The zinc content in the hair of 654 children living in various rural and industrial areas in southern Poland was assayed by means of the atomic absorption spectrometry, following the dry digestion procedure. The hair of girls exhibited statistically significant higher level of Zn than the boys' hair, although in the site of extremal Zn contamination, the inverse relation was found.

Chromium concentrations in hair were compared in groups of children and students from Southern Poland. There were no statistically significant differences (at p greater than 0.05) between girls and boys. The results are similar to those found by other authors in different countries.

Children are particularly vulnerable to zinc (Zn) deficiency during periods of rapid growth and development such as infancy and adolescence. The aim was to find the relationship between food frequency, intake, food habits and zinc status in 11-year-old healthy children from southern Poland. The study group comprised children (n = 157) in the age range 11.0 ± 0.4 years. The level of Zn in serum, erythrocytes and hair samples was measured using atomic absorption spectrophotometry. The parents of children examined completed a special food frequency questionnaire. The Zn concentration in hair (boys 182.98 ± 65.63 µg g[sup -1], n = 78; girls 203.82 ± 39.80 µg g[sup -1], n = 79; p = 0.0171), erythrocytes (8.60 ± 2.76 mg l[sup -1], n = 50) and blood serum (0.79 ± 0.15 mg l[sup -1]) correlated significantly (p < 0.05) with frequency intake of different products (hair: meat, rolls, fruit juices without additives, brawn, pate, barley, black pudding, fish canned, chips, margarine used for cooking, bacon; erythrocytes: fruits, matured cheese, dishes of meal, white cottage cheese, fruit juices without additives, cakes and cakes with cream, margarine used for bread spread; blood serum: bread, fruits, milk, kefir, yoghurt). The relationship of the Zn amount in food products, food frequency intake and the concentration in different healthy children tissues is influenced by many internal and external factors. [ABSTRACT FROM AUTHOR]