【作者】 俞博凡； 温丽丽； 宋永会； 刘鸿亮； 司继宏； 李海洋；

【Author】 Bofan Yu~(1,2) Lili Wen~1 Yonghui Song~(1*) Hongliang Liu~1 Jihong Si~1 Haiyang Li~3 1 Chinese Research Academy of Environmental Sciences,Beijing 100012,China 2 School of Environment,Beijing Normal University,Beijing 100875,China 3 Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023, China

【机构】 中国环境科学研究院； 北京师范大学环境学院； 中国科学院大连化学物理研究所；

【摘要】 为建立水源地污染事故监控预警系统,采用膜进样/飞行时间质谱技术,对典型挥发性有机物的模拟事故污染进行在线监测。结果表明该方法响应时间很短(苯系物30～70s、卤代烷30s),线性范围较宽(3～4个数量级),苯系物和氯苯的检测限(小于10ppb)满足水源地监控预警的要求。连续30天模拟事故的在线监测证明,该方法稳定性强(平均波动小于5%),平均相对误差26.7%(定期绘制标准曲线可使其减小至10%以内),适用于水源地污染事故的监控预警。更多还原

【Abstract】 For constructing a monitoring and early-warning system of source water pollution accident,membrane inlet/time-of-flight mass spectiometry was applied to the online monitoring of some typical volatile organic compounds.The results show that the system responds quickly to benzene hydrocarbons(30-70 s) and halogenated aliphatic hydrocarbons (30 s);the linear range is 3-4 magnitudes;the detection limits of benzene hydrocarbons and chlorobenzene are less than 10 ppb.Thirty days’ continuous monitoring indicates that the system is stable(relative standard deviation<5%);the accuracy is acceptable (relative error is 28.7%and can be reduced to within 10%by periodical calibration). The system is proven to be available for the monitoring and early-warning of source water pollution accident.更多还原