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实验选择重庆市城区相同年龄段（6～7岁）学龄前儿童240名，男、女各半，观察儿童血铅、发铅含量及其与生长发育的关系。结果显示：生活在重庆闹市区的学龄前儿童受到的铅污染相当严重，以推荐的0．483μmol／L为全血铅可接受上限值，则春季有50．9％（平均0.483μmol／L）儿童，秋季有高达81.66％（平均为0.650μmol／L）儿童血铅浓度超过标准，发铅的测定也显示相似结果。本实验还发现重庆春、秋两季，男、女性别之间儿童铅含量有较大差异，以秋季男性儿童血铅、发铅含量为高，这种差异可能与重庆地理气候、男性儿童户外活动等有关。另外，学龄前儿童膝高与血铅、发铅水平存在显著负相关，揭示体内铅含量可能直接影响儿童生长发育。
Two hundred and seventy preschoolers of the same age group (6-7 years old) in urban area of Chongqing were selected to study the relationship between lead and lead in children and their relationship with growth and development. The results showed that pre-school children living in downtown Chongqing were seriously polluted by lead, and the recommended upper limit of acceptable lead of 0.483μmol / L for whole blood was 50.9% in spring (average 0.483μmol / L ) Children, up to 81.66% (0.650μmol / L on average) of children in the fall had a blood lead level exceeding the standard, and hair lead measurements also showed similar results. The experiment also found that Chongqing spring and autumn, male and female children between the different levels of lead have greater differences in autumn male children with lead in blood lead, hair content is high, this difference may be with the geographical climate in Chongqing, male outdoor children Activities related. In addition, preschool children knee height and blood lead, hair lead levels there is a significant negative correlation, revealing body lead content may have a direct impact on children’s growth and development.