【摘要】 本文采用原子吸收法对上海地区50种常用食物作了锌、铜、铁含量的测定。结果表明,肝、肉、蛋黄和海产类上述元素的含量较多,植物性食物次之,而水果则含量极微。在各种食物中这三种元素的含量常呈正相关。虽然食物中锌和铁的含量较铜多,但由于每日锌和铁的需要量分别为铜的5倍和10倍,而且食物中的植酸盐和纤维素均能妨碍其吸收,故二者同时缺乏颇为常见。 牛乳中这三种元素的含量均不能满足小儿生长发育的需要,故对乳制品应加以强化。更多还原

【Abstract】 The content of zinc, copper and iron of 50 different kinds of commonly used foods in Shanghai determined by atomic absorption spectrophot-ometer is presented. In general, liver, meat, egg yolk and marine products are the best sources of above elements. Plant foods usually contain less amount and the contents of fruits are negligible. There are positive correlations among the contents of zinc, copper and iron in all foods described above. Although the zinc and iron contents exceed the copper, but the recommended daily intake of zinc and iron were 5 and 10 times greater than that of copper respectively, and the phytate and cellulose in foods can hinder the absorption of zinc and iron. Hence zinc and iron deficiencies are expected to be higher.The contents of these elements in cow’s milk can’t meet the demand of the infant growth and development. So it is reasonable to enrich the cow’s milk products with these elements.更多还原