摘要
研制了一套远距离多通道VOCs连续采样在线监测系统。监测系统主要由远距离多通道VOCs连续采样装置与真空紫外灯单光子电离源飞行时间质谱仪组成。通过PAMS与有机硫标准气体对该系统进行了性能表征测试。结果表明:各物质连续7次实验RSD≤7%;最优检测限为0.004μmol·mol^(−1);在0.01~1.00μmol·mol^(−1)浓度范围内各物质判定系数大于0.99;定量误差在−13%~25%之间,可以满足环境中VOCs监测要求。该监测系统采样距离为500 m,可在1 h内完成10个不同点位的采样,并可对C4~C10烃类、有机硫化物和苯系物VOCs进行在线分析。该系统可应用于化工园区无组织排放VOCs的在线监测中。
In this study,an online remote and multi-channel VOC monitoring system is developed.The monitoring system is mainly composed of a remote and multi-channel continuous sampling device and a vacuum ultraviolet single-photon ionization time-of-flight mass spectrometer.The system was characterized by PAMS and organic sulfur standard gases.Results showed that the RSD(n=7)of each substance was less than 7%and the detection limit was 0.004μmol·mol^(−1).The linear range was 0.01~1μmol·mol^(−1)and the determination coefficient of each substance was greater than 0.99.The quantitative error is between−13%and 25%,which meets the monitoring requirements of VOCs in the environment.By using the monitoring system,analysis of samples from 10 different sampling points can be completed within 1 h;the sampling sites were 500 m away from the monitoring site.On-line analysis of C4~C10 hydrocarbons,organic sulfides and benzene VOCs have been successfully demonstrated.This study has broad application prospects in the monitoring of fugitive emissions of VOCs in chemical parks.
作者
曹迅
陈伟章
杜华忠
洪义
吕金诺
莫婷
马琳
黄正旭
高伟
CAO Xun;CHEN Weizhang;DU Huazhong;HONG Yi;LYU Jinnuo;MO Ting;MA Lin;HUANG Zhengxu;GAO Wei(Institute of Mass Spectrometry and Atmospheric Environment,Jinan University,Guangzhou 510632,China;Guangzhou Hexin Instrument Co.Ltd.,Guangzhou 510530,China;Comprehensive Service of Zhejiang Toumen Port Economic Development Zone,Taizhou 318000,China;Henan Xinxiang Ecological Environment Monitoring Center,Xinxiang 453000,China;Guangdong Provincial Engineering Research Center for On-Line Source Apportionment System of Air Pollution,Guangzhou 510632,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第2期737-745,共9页
Chinese Journal of Environmental Engineering
基金
广州市科技计划项目(201710010005)
广东省重点领域研发计划项目(2020B1111360002)。
关键词
远距离
多个采样通道
无组织排放
挥发性有机物
连续在线监测
remote
multiple sampling channels
fugitive emission
volatile organic compounds
continuous on-line monitoring
