Occurrence of perchlorate in grain from different parts of China and exposure risk assessment
As a new persistent pollutant,perchlorate in the environment and food may pose a threat to human health.However,up to now,there were limited available data on the occurrence of perchlorate in grain samples in China.In this study,we aim to investigate the occurrence of perchlorate in grain and assess the risk of perchlorate exposure through grain consumption via collecting a total of 271 grain samples from various regions of China,including rice(n=88),wheat(n=83)and corn(n=100).The result showed that concentrations of perchlorate in rice ranged from non-detection to 66.41 ng·g-1,those in wheat were from 1.90 ng·g-1 to 108.71 ng·g-1,and those in corn were from 0.31 ng·g-1 to 45.52 ng·g-1.The estimated daily intake(EDI)of perchlorate via the consumption of rice,wheat,and corn was calculated for local residents based on the measured concentrations of perchlorate.After that,the potential health risk of human exposure to perchlorate was evaluated via calculating the hazard quotient(HQ).The result showed that all HQ values were lower than 1,indicating that perchlorate in these three staple foods may not pose potential risks for human.However,considering the multiple pathways of human exposure to perchlorate and the possible increase of perchlorate concentrations in grain during their processing process,the risk of human exposure to perchlorate through grain consumption should be concerned.
NETL
NSTL
万方数据
