对象为南宁市托幼机构中,3～6岁612名正常健康儿童,分为四个年龄组.用不锈钢剪刀各剪取枕后接近皮1 cm～2 cm新生头发0.5～1克,用原子吸收光度法测定.结果表明,未发现锌、铜、铁在性别之间有显著性差异(P>0.05).在年龄方面,发锌、铜、铁的均值经统计学处理后,发锌在5岁组和6岁组明显高于3岁组与4岁组;发铜3岁组与5、6岁组之间有显著差异;发铁5 The object for the nursery in Nanning institutions, 3 to 6 years old, 612 normal healthy children, divided into four age groups with stainless steel scissors after each cut the pillow close to the skin 1 cm ~ 2 cm 0.5 ~ 1 gram of newborn hair, with atoms The results showed that there was no significant difference in gender between zinc, copper and iron (P> 0.05) .According to the statistical analysis, 5-year-old group and 6-year-old group was significantly higher than the 3-year-old group and 4-year-old group; hair copper 3-year-old group and 5,6-year-old group were significantly different;