Dietary intakes of lead in children and adults of Jinhu area measured with duplicate portion study

Objective To understand the dietary lead intakes of children and adults in Jinhu area in Jiangsu province and assess its safety.Methods The duplicate food portions of 62 subjects were collected over 3 consecutive days.Lead levels in duplicate samples were dete rmined by graphite furnace atomic absorption spectrometry.The safety of dietary lead intakes of children and adults was evaluated by using the dietary lead PTWI recommended by JECFA of FAO/WHO.Results A total of 178 duplicate food portions was collected(89 from adults,89 from children).The detection rate for lead was 94.4%.The daily lead intakes of children and adults were 0.1-7.4,0.1-7.6μg/kg·bw with means of 6.9,5.3 μg/kg·bw,respectively.The percentile 97.5 weekly dietary lead(of PTWI)intakes of children and adults were 24.3 (97.2%),23.6μg/kg·bw(94.4%),respectively.The weekly dietary lead intakes of children calculated on a body weight basis were higher than that of adults(Z=2.9847,P<0101).Conclusion It is concluded that the lead pollution in dietary of children and adults in Jinhu area is serious,and dietary lead in take need to be reduced by taking effcient measures in order to minimize the adverse health effects related.