Analysis on internal exposure to arsenic and selenium in residents of central and western Yunnan in 2017

Abstract

Abstract: Objective To grasp the internal exposure to arsenic（As） and selenium（Se） in the permanent residents in central and western Yunnan,as well as regional and population distribution characteristics. Methods The multi-stage complex sampling,proportional probability sampling,and stratified random sampling were adopted to determine the monitoring points,survey units and respondents in Yunnan Province.In accordance with the principle of informed consent,the peripheral venous blood and urine samples of the subjects were collected,packed,transported,and tested of As and Se in the laboratory.Microsoft Excel,SPSS 25.0 and GraphPad Prism 8 were using for data sorting and analysis. Results A total of 720 permanent residents incentral and western Yunnan Province were surveyed in 2017,then the number of valid blood samples and urine samples were 709 and 719,respectively.The median of As in blood and urine was 2.40 and 19.38 μg/L respectively,while that of Se was 82.40 and 14.56 μg/L respectively.There were statistically significant differences in the concentrations of blood As,urine As,blood Se and urine Se among residents in different regions,and between urban and rural residents（all P<0.05）. There were statistically significant differences in the concentrations of blood As and urine Se among residents in different age and gender（all P<0.05）. The urine Se concentration of males was lower than that of females（P<0.01）. Conclusion The regional and population distribution differences of internal exposure to As and Se are found among the permanent residents in central and western Yunnan,and the blood As and Se of the residents in central Yunnan are higher than those in western Yunnan.

Key words: Human biomonitoring, Internal exposure, Arsenic, Selenium

CLC Number:

R181.3⁺4

LI Yang, YANG Jianbin, LI Jianyun, DI Juan, ZHANG Xuhui, ZHANG Ruixian. Analysis on internal exposure to arsenic and selenium in residents of central and western Yunnan in 2017. [J]OCCUPATION AND HEALTH, 2023, 39(14): 1925-1928.

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