基于吸附管采样/冷阱聚焦方法的环境大气VOCs富集系统研究

大气与环境光学学报 ›› 2019, Vol. 14 ›› Issue (4): 266-271.

基于吸附管采样/冷阱聚焦方法的环境大气VOCs富集系统研究

刘伟^1,2,张天舒¹,陆钒¹,刘永超^1,2,周培松¹,胡荣春^1,2

1. 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室安徽合肥 230031；
2. 中国科学技术大学，安徽合肥 230026

收稿日期:2018-03-27 修回日期:2018-04-18 出版日期:2019-07-28 发布日期:2019-07-12

Research of Enrichment System for VOCs in Ambient Air Based on Adsorbent #br# Tube Sampling/Cold Trap Focusing Method

Received:2018-03-27 Revised:2018-04-18 Published:2019-07-28 Online:2019-07-12

摘要/Abstract

摘要： 研制出一种基于吸附管采样/冷阱聚焦方法的环境大气挥发性有机物(Volatile organic compounds, VOCs)富集
系统。环境大气中的VOCs先被吸附管采样,之后转移聚焦至冷阱中,冷阱热解析后VOCs随高纯载气进入GC-FID系
统中。使用标准气体(苯、甲苯、乙苯)测定系统性能,实验结果表明:本系统设计的冷阱对于VOCs(苯系物)聚
焦效率达到90%以上,标准样品相对标准偏差均小于3%,线性相关系数均大于0.99。该系统运行稳定,满足对环境
大气的VOCs富集的需求。

关键词: 环境大气挥发性有机物, 吸附管采样, 冷阱聚焦, 热解析, GC-FID

Abstract: An enrichment system for volatile organic compounds (VOCs) in ambient air based on adsorbent
tube sampling/cold trap focusing method was developed. The VOCs in ambient air are sampled
firstly by the adsorbent tube, and then focused on the cold trap. After the cold trap
thermal analysis, the VOCs enter the GC-FID system with the high purity carrier gas.
The performance of the system was measured by using standard gases(benzene, methylbenzene,
ethylbenzene). The experimental results show that the cold trap designed by this system
has a focusing efficiency of more than 90\% for VOCs (benzene series), and relative standard deviation
of standard samples is less than 3\%, and the linear correlation coefficient is greater
than 0.99. The system is stable in operation, and satisfies the demand for enrichment of VOCs in the ambient air.

Key words: volatile organic compounds in ambient air, adsorbent tube sampling , cold trap focusing, thermal analysis, GC-FID

刘伟,张天舒,陆钒,刘永超,周培松,胡荣春. 基于吸附管采样/冷阱聚焦方法的环境大气VOCs富集系统研究[J]. 大气与环境光学学报, 2019, 14(4): 266-271.

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