Analysis of correlation between Iodine,Fluorine,Selenium in drinking water and urine Iodine of elementary students at Yanchi County

Objective To investe residents' intake status of these three elements in districts of iodine deficiency merging with fluorosis.Methods In per of all 8 countries or towns of Yanchi County drinking water,80 urine specimens of 8~10 year-old elementary students were sampled randomly for detecting the density of iodine,fluorine,selenium in water and iodine in urine and analyzing their correlations.Results Total content medians of iodine,fluorine,and selenium of drinking water which were selected from 8 countries or towns in Yanchi County were 30.6μg/L,2.8mg/L,4.7μg/L respectively,and there were significant concentration correlations between iodine,fluorine and selenium separately(P0.01).The median of students urine iodine did not correlated to that of content common-factor of water iodine,fluorine and selenium at level of country or town(P=0.207).Conclusions Ecologically,iodine,fluorine and selenium content of drinking water correlate with each other and not correlate with urine-iodine concentration of elementary students at Yanchi County.Fluorosis,IDD and the diseases which are related to excessive intake of iodine and selenium should be paid attentions by degrees from high to low.Besides,reduction of iodine and selenium should be avoided when practicing the project of reducing water fluorine at this county.