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测定了阳江市４０００多名１～７岁幼儿园幼儿发中的Ｚｎ、Ｆｅ、Ｃｕ、Ｃａ、Ｍｎ和Ｐｂ等６种元素含量，详细研究了其微量元素含量水平分布，发现该市幼儿上述元素含量均明显偏离正常范围，特别是Ｚｎ和Ｐｂ的不合格率均在５０％以上。计算机多因素识别法研究指出，阳江市幼儿发中上述元素与微量元素总体水平较好的深圳市相比，存在着显著性差异，其微量元素谱确实有较大区别，样本点在模式空间的聚集区域不同，周界比较清楚。
The contents of 6 elements in Zn, Fe, Cu, Ca, Mn and Pb in more than 4,000 kindergartens aged from 1 to 7 years in Yangjiang City were determined. The content of trace elements in the kindergarten children was also studied. Significantly deviate from the normal range, especially the failure rate of Zn and Pb are more than 50%. Computer multi-factor identification study pointed out that Yangjiang City, children’s hair in the above elements and the overall level of trace elements in Shenzhen better, there is a significant difference, the trace element spectrum does have a larger difference, sample points in the model space Aggregation area is different, the perimeter is more clear.