铅是一种不降解的环境污染物 ,可通过水、空气、母乳等进入人体 ,尤其对儿童危害更大。早在 1943年Ｂｙｅｒｓ等人就曾报道过铅对儿童神经行为和智力发育的远期危害[1 ] 。测定血锌原卟啉 (ＺＰＰ)作为普查铅中毒和缺铁性贫血的指标已被公认[2 ] 。为了探讨我市儿童ＺＰＰ正常 Lead is a non-degradable environmental pollutant that can enter the human body through water, air, breast milk, etc., especially for children. As early as 1943, Byers et al. Reported the long-term harm of lead to children’s neurobehavioral and intellectual development [1]. The determination of zinc protoporphyrin (ZPP) as an indicator of lead poisoning and iron deficiency anemia has been recognized [2]. In order to explore the normal ZPP children in our city