中文摘要：

采用热解析气相色谱法采集分析空气中痕量BTEX，研究了新建大学校园内教室、图书馆、食堂等公共场所及学生宿舍空气中BTEX的浓度水平、来源及健康风险．结果表明，室内BTEX的平均浓度为（46．56±4．60）μg·m^-3，其中甲苯和苯含量较高，分别为（21．23±2．13）和（8．95±6．45）μg·m^-3.不同场所BTEX浓度大小为学生宿舍〉食堂〉教室〉图书馆．其中学生宿舍空气中71．61％的BTEX来自室内源，27．29％来自室外源．苯暴露对学生的致癌风险为9．24×10^-6，超过了美国EPA制定的人体致癌风险限值，

英文摘要：

The concentrations, source analysis and carcinogenic risks of BTEX in different indoor environments of a university campus such as classrooms, libraries, canteens and dormitories were investigated. The mean concentration of BTEX was （46.56±4.60） μg·m^-3, of which toluene and benzene were the most abundant compounds with concentrations of （21.23 ±2. 13 ） and （8.95 ±6.45 ） μg· m^-3, respectively. The BTEX concentrations occurred in the order： dormitories 〉 canteens 〉 classrooms 〉 libraries. Dormitories were chosen for factor analysis, the results of which indicated that 71.61% of BTEX came from indoor sources, while 27.29% came from outdoor sources. The carcinogenic risk of benzene was evaluated to be 9.24 ×10^-6 and was much higher than the limit set by USEPA.