Comparison And Correlation Of Mercury Contents In The Bodies Of Pregnant Women And Cord During Perinatal Period

This paper chooses coastal city with high-speed urbanization and industrialization as survey area,analyses the level of mercury content and methyl mercury content in blood and mercury content in hairs of pregnant women and cord by establishing the test methods for content in human blood and hair,discusses the feature of mercury pollution in pregnant women and cords,and evaluates the health risks of mercury in pregnant women and cord by comparison with the related standards.The research finding of this paper could be referenced for further research about mercury pollution in the air and human health,and could be used for making policy to reduce mercury pollution or for promoting regional population eugenics.The research method and conclusion are as followings:1.Main research design(1)Establishing the detection method to test the mercury content and methyl mercury content in human blood and mercury content in human hair.(2)Randomly choosing blood and hair samples from 150 pregnant women and their cords in Quanzhou City Hospital,and studying the health risks from mercury content in these samples?2.Research method and result(1)Mercury contents was studied from samples by MERX automatic mercury analyzer.Result shows that the average mercury content in blood of pregnant women is(3.67±1.85)ng/g,and the concentration range is 0.87~8.98 ng/g,the average mercury content in cord blood is(4.79±3.29)ng/g,and the concentration range is 0.50~15.15 ng/g.Among all samples,66.3% of them shows that the mercury content in cord blood is higher than mercury content in blood of mothers,which means the mercury content in cord blood is higher than that in blood of mothers.As a whole,and the mercury content in cord blood is 1.3 times as much as that in blood of mothers.(2)Methyl mercury content from samples by MERX automatic mercury analyzer.Result shows that the average methyl mercury content in blood of pregnant women is(2.19±1.43)ng/g,and the concentration range is(2.86±2.11)ng/g.The methyl mercury content in cord blood is higher than methyl mercury content in blood of mothers,and the methyl mercury content in neonatal cord blood is 1.3 times as much as that in blood of mothers.Among all samples,there are 93 cords have higher methyl mercury content than that of their mothers,and that is 62% of all samples,which means the methyl mercury content in cord blood is higher than that in blood of mothers as a whole.(3)Mercury content from hairs of samples was studied by mercury analyzer(Lumex RA 915+)and its Biological sample pyrolysis attachment(PYRO-915+).The result show that the average mercury content in hairs of pregnant women is 770.89±489.27 ng/g,the average mercury content in hairs of cord is 630.13±326.00 ng/g.The mercury content in hairs of pregnant women is 1.22 times as much as that in hairs of cord.The average mercury content of hairs of 94 male cord is 695.6 ng/g,and the average mercury content of hairs of 56 female cord is 513.7 ng/g,which shows hairs of male cord can accumulate more mercury than hairs of female cord.3.Conclusion(1)The average methyl mercury content and mercury content in cord blood are higher than methyl mercury content and mercury content in the blood of pregnant women,and the health risks of cord are higher than health risks of pregnant women.(2)The ability of accumulation of mercury in human hairs is related to age,and the influence of mercury content in pregnant women is higher for male cord than that of female cord(3)The mercury content in cord blood has an influence on the ability to accumulate mercury of human hairs,but this influence is more obvious on male cord than the influence on female cord.