某校学生工频磁场暴露水平的调查  

Exposure of College Students to Power Frequency Magnetic Field

作　　者：訾军[1] 何永华[1] 常秀丽[1] 张平[1] 周志俊[1] 

机构地区：[1]复旦大学公共卫生学院,教育部公共卫生安全重点实验室,WHO职业卫生合作中心,上海200032

出　　处：《环境与职业医学》2010年第10期594-596,601,共4页Journal of Environmental and Occupational Medicine

基　　金：WHO中国双边合作项目(编号:200198284);上海市公共卫生重点学科建设项目(编号:08GWZX0303);上海市学科带头人培养计划(编号:08GWD20)

摘　　要：[目的]评估某校学生工频磁场的暴露强度、来源和24h内的变化趋势,为进一步的研究提供暴露水平数据。[方法]采用EMDEX-LITE个体测量仪器检测研究对象24h的工频磁场暴露情况,并以调查问卷收集其个人基本信息及当天的活动情况。[结果]收集92份个体测量数据,其中男性44人,女性48人,年龄在21~34岁之间。该校学生24h累积暴露量的中位数为1.249μT/h,四分位数间距（IQR）为0.930μT/h;不同性别、不同学历之间（本科生和研究生）的平均累积暴露水平差异无统计学意义。暴露于工频磁场的途径主要是使用电脑（占49%）,出现峰值的地点大致集中在学校的宿舍、图书馆、食堂。在24h的测量时间中,接触高于界点（〉0.4μT）工频磁场的人数因时间段不同而异,与个体的活动密切相关。[结论]该校学生在工频磁场暴露水平方面的数据显示,工频磁场的暴露强度与活动、地点密切相关。[Objective] To assess the exposure levels and sources of power frequency magnetic field in college students and analyze the features.[Methods]Personal samplers were used to measure their 24 h exposure to power frequency magnetic field.A questionnaire were filled to record the personal information and activities.[Results] Ninety-two individual samples were collected,comprising 44 males,48 females,with their age ranging from 21 to 34 years old.The median and interquartile rang（eIQR） of cumulative exposure levels over 24h was 1.249μT/h and 0.930μT/h,with no significant difference by sex,academic degrees （undergraduate and graduate students）.The main source was the computer,and the location of the peak exposure were generally concentrated in school dormitory,library and dining hall.During the 24 h,the frequency of people exposuring to high level magnetic field（0.4μT）was diversed in different periods of time and was associated with personal activities.[Conclusion] The study substantially expands information on students exposure to power frequency magnetic field in college and the exposure levels is related to personal activities and locations.

关 键 词：工频磁场 暴露水平 学生 

分 类 号：R144[医药卫生—公共卫生与预防医学]