武汉市健康儿童头发与血清中七种微量元素和镁的含量

作者对武汉市210例7～12岁健康儿童头发和血清中锌、铜、铁、锰、铬,硒、镉七种微量元素和镁的含量及其影响因素进行了研究,其中硒采用阴极溶出伏安法测定,其它元素采用原子吸收光谱法。结果表明,发铜男低女高,性别差异显著;发锌和锰与年龄呈显著正相关,发镉则呈负相关,这种年龄差异反映出各年龄对微量元素的需要量不同;学龄期组与学龄前期组和青少年组比较,发锌随年龄增加而增加,发铬和硒随年龄增加而减少。逐步回归分析结果表明,头发和血清微量元素含量之间有一定关系,其中发锌与血清锌呈显著正相关;身高与发锰、发铁和发锌以及体重与血清铜之间存在一定的回归关系,提示这些元素对身高和体重发育有一定影响。

THE CONTENTS OF SEVEN TRACE ELEMENTS AND MAGNESIUM IN HAIR AND SERUM OF CHILDREN IN WUHAN

Seven trace elements (Zn, Cu, Fe, Mn, Cr, Se, Cd) and Mg contents in hair and serum of 210 healthy school children in wuhan were analysed by atomic absorption spectrophotometry except that Se content was determined by cathodic stripping voltammetry. Hair Cu content of males was Lower than that of females significantly. There were significant positive correlation between hair Zn or Mn content and age, and negative correlation between hair Cd content and age, respectively. These demonstrated that the requirements for tract elements were different with age. By comparing the school-aged group with the preschool-aged group and the adolescent group, the hair Zn content was related positively, and Cr and Se negatively, to age. The results by step-wise regression analyses showed that trace elements in hair and serum interacted each other, of which hair Zn content correlated posititvely to serum Zn content. There were correlations among height and hair Mn, Fe, and Zn contents, and between weight and serum Cu content. The results suggested that these elements could influence the developments of height and weight in some degree.