挥发性有机物吸附浓缩采样装置改进与应用  

Improvement and Application of Sampling Device for Adsorption and Concentration of Volatile Organic Compounds

作　　者：郭心怡 吴曼曼 马超 陈家新 林大军 周振[1] 高英楠 高伟[1,4] GUO Xin-Yi;WU Man-Man;MA Chao;CHEN Jia-Xin;LIN Da-Jun;ZHOU Zhen;GAO Ying-Nan;GAO Wei(Institute of Mass Spectrometry and Atmospheric Environment,College of Environment and Climate,Jinan University,Guangzhou 510632,China;Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control,State Key Laboratory of Luminescent Materials and Devices,School of Environment and Energy,South China University of Technology,Guangzhou 510006,China;Xinjiang Uygur Autonomous Region Ecological and Environmental Monitoring General Station,Urumqi 830011,China;Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution,Guangzhou 510632,China;Guangzhou Hexin Instrument Co.Ltd.,Guangzhou 510530,China)

机构地区：[1]暨南大学环境与气候学院,质谱仪器与大气环境研究所,广州510632 [2]华南理工大学环境与能源学院,发光材料与器件国家重点实验室,广东省大气环境与污染控制重点实验室,广州510006 [3]新疆维吾尔自治区生态环境监测总站,乌鲁木齐830011 [4]广东省大气污染在线源解析系统工程研究中心,广州510632 [5]广州禾信仪器股份有限公司,广州510530

出　　处：《分析化学》2024年第10期1487-1495,共9页Chinese Journal of Analytical Chemistry

基　　金：广东省重点领域研发计划项目(No.2020B111136002)资助。

摘　　要：设计了一种挥发性有机物(Volatile organic compound,VOCs)吸附浓缩采样装置,提高了挥发性有机物吸附浓缩在线监测系统长期监测的稳定性,解决了高碳类物质响应衰减快的问题。设计的VOCs解吸脱附装置加热时的平均升温速率为40℃/s,温度变化的相对标准偏差(RSD)为0.4%。采用此装置对116种VOCs混合标准气体进行定量分析,结果表明,标准曲线合格率由90%显著提升至99%,方法检出限低于0.1 nmol/mol的达标比例从85%增加至90%,系统残留低于0.1 nmol/mol的达标比例从85%增加至90%,长期监测的稳定时间由20 d延长至30 d以上,更有利于仪器长期无人值守监测。An adsorption and concentration sampling device for volatile organic compounds(VOCs)was designed in this work,which improved the long-term monitoring stability of the online monitoring system for VOC adsorption and concentration,and solved the issue of rapid attenuation of responses toward higher carbon compounds.The designed VOC desorption device achieved an average heating rate of 40℃/s,with a relative standard deviation(RSD)of 0.4%.Quantitative analysis of mixture of 116 kinds of different VOC standard gases was performed,and the test results showed that the qualification rate of standard curves increased significantly from 90%to 99%,the proportion of detection limits below 0.1 nmol/mol improved from 85%to 90%,and the proportion of residual levels in the system below 0.1 nmol/mol also increased from 85%to 90%.The stable monitoring period was extended from 20 d to over 30 d,making it more conducive to long-term unattended monitoring by the developed instrument.

关 键 词：挥发性有机物 吸附浓缩 采样装置 

分 类 号：X831[环境科学与工程—环境工程]