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采用日本岛津AA-670型全自动原子吸收分光光度计、Air／C2H2标准曲线法测定学龄前儿童（2-6岁）100例,学龄儿童（7-11岁）60例头发中铅的含量.结果表明,学龄前儿童发铅含量为11.05×10-6±5.06×10-6.学龄后儿童发铅含量为7.53×10-6±4.28×10-6.经t检验：P＜0.01,两者具有高显著性差异.
Using Japan Shimadzu AA-670 automatic atomic absorption spectrophotometer, Air / C2H2 standard curve method to determine the preschool children (2-6 years old) 100 cases, school-age children (7-11 years old) 60 cases of hair lead content The results showed that the lead content of preschool children was 11.05 × 10-6 ± 5.06 × 10-6.The lead content of post-school children was 7.53 × 10-6 ± 4.28 × 10-6.The t test: P <0.01, Both have high significant differences.