VUV-TOFMS二恶英在线检测应用研究  

Research of on-Line Monitoring of Dioxins with VUV-TOFMS

作　　者：李雪倩[1] 张晓翔[1] 严密[1] 李晓东[1] 严建华[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《工程热物理学报》2011年第8期1437-1439,共3页Journal of Engineering Thermophysics

基　　金：国家高科技研究发展计划(No.2007AA06Z336);国家自然科学基金(No.50576082)

摘　　要：通过指示物间接实现二恶英在线检测是一种可行的检测方法,氯苯是较合适的指示物。本文采用真空紫外光电离/飞行时间质谱仪进行定浓度一氯苯(MCBz)和1.2-二氯苯(DCBz)为二恶英指示物在线测量,两种物质的检测信号峰具有很好的辨别度,峰值都在6以上,检测信号强度与实际浓度之间用常用对数(1g)拟合关系最为理想。MCBz和DCBz的信号集中在4～12 min内,其信号基本符合正态分布的形式。离线测量与在线测量数据对比表明,DCBz的检测信号与二恶英生成总量和毒性当量的变化趋势相同,MCBz的检测信号则与二恶英信号的变化趋势不同。It is a potential monitoring method using indicators to detect indirectly dioxins online. Chlorobenzene is considered as the appropriate one. Vaccum ultraiolet photo ionization/time-of-flight mass spectrometer （VUV-TOFMS） was used for monitoring of Cl1Bz（MCBz） and 1.2-C12Bz（1.2DCBz） in certain concentration. The signals had good discrimination and signal peak could be above 6. The obtained mean signal intensity showed a good relation with real concentration levels by logarithm fit. The signals of MCBz and 1.2DCBz mainly appeared in the forth to twelfth minute with normal distribution. Comparison between off-line measure and on-line detection showed that signal trend of DCBz was in accordance with the trends of total amounts and toxic equivalent quantity of dioxin, but that of MCBz was different.

关 键 词：二恶英 在线检测 指示物 飞行时间质谱仪 

分 类 号：TK01[动力工程及工程热物理]