摘要
差分吸收光谱技术(DOAS)是利用气体分子在紫外/可见波段的特征吸收来精确解析其浓度的光学方法。目前,该方法在大气污染成分探测方面有着广泛的应用.采用自行研制的便携式差分吸收光谱系统测量污染源区的单环芳香烃有机物,研究了影响单环芳香烃光谱反演的主要干扰因素,分析比较了去除O_2干扰的相对和绝对浓度反演方法,给出便携式差分吸收光谱系统在光程为24 m条件下系统的检测限,并在化工厂区进行了单环芳香烃浓度的实际测量,结果表明便携式差分吸收光谱系统可应用于挥发性有机物污染源、污染泄露的应急监测.
Differential optical absorption spectroscopy technique （DOAS） has been used to measure trace gases in the atmosphere. This technique uses the gases＇ strongly structured absorption of radiation in the UV and visible spectral range to retrieve their concentration. The measurement on monocyclic aromatic hydrocarbons （MAHC） was carried out using the portable DOAS system developed by Anhui Institute of Optics and Fine Mechanics. The retrieval method for measuring MAHC with the system and the effect of relative retrieval and absolute retrieval methods to remove the interference of O2 were analyzed. The detect limits of portable DOAS are given. The results demonstrate that the portable DOAS system can be applied to polluted sources of MAHC and polluted gases leak monitoring.
出处
《大气与环境光学学报》
CAS
2010年第1期46-53,共8页
Journal of Atmospheric and Environmental Optics
基金
国家863计划项目(2006AA06A306)
安徽省自然科学基金项目(6094033)资助
关键词
差分吸收光谱
便携式
单环芳烃
监测
differential optical absorption spectroscopy
portable
monocyclic aromatic hydrocarbons
monitoring
