我院用原子吸收光谱法对广州市区的1,147名1～9岁儿童发锌值进行调查表明,25%儿童发锌低于正常值下限,生长发育迟缓的儿童中,约40%发锌低于正常值下限,生长发育正常的儿童中,也有部份儿童处于亚临床锌缺乏状态。一、方法(一)发样的采集和处理:广州市区内5间托幼机构的全部儿童,两间小学的1年级学生,少量散居儿童,共1,147人。剪取头部后枕部贴头皮头发约1 In our hospital, atomic absorption spectrometry was used to investigate the zinc value of 1,147 children aged from 1 to 9 in Guangzhou. The results showed that in 25% of children, hair zinc was lower than the lower limit of normal value. About 40% of children with growth retardation developed zinc deficiency In the lower limit of normal, normal growth and development of children, some children are in the subclinical zinc deficiency. Methodology 1. Collection and Processing of Hair Samples: All children in 5 child-care institutions in Guangzhou, 1-year-old students in 2 primary schools and a small number of scattered children totaled 1,147. Cut the head after the occipital skin hair about 1