| Title: | An online method for monitoring atmospheric intermediate volatile organic compounds with a thermal desorption-gas chromatography/mass spectrometry |
| Author(s): | Lu J; Li Y; Li J; Jing S; An T; Luo H; Ma C; Wang H; Fu Q; Huang C; |
| Address: | "State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China; Shanghai Environmental Protection Key Laboratory for Environmental Standard and Risk Management of Chemical Pollutants, School of Resources & Environmental Engineering, East China University of Science & Technology, Shanghai 200237, China. State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China. Electronic address: Liyj@saes.sh.cn. State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China. State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China; College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China. State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China; School of Resource and Environmental Engineering, Shanghai Polytechnic University, Shanghai 201209, China. School of Resource and Environmental Engineering, Shanghai Polytechnic University, Shanghai 201209, China. Shanghai Environmental Monitor Center, Shanghai 200030, China" |
| DOI: | 10.1016/j.chroma.2022.463299 |
| ISSN/ISBN: | 1873-3778 (Electronic) 0021-9673 (Linking) |
| Abstract: | "As one of important precursors of secondary organic aerosol (SOA), intermediate volatile organic compounds (IVOCs) have attracted much attention in recent years. Most of the previous studies however largely focused on characteristics of IVOCs from different emission sources, while data from field observations to study their temporal variations was limited for lacking the sufficient time resolution monitoring data. In this study, an online thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) method was developed to generate monitor data with a three-hour time resolution for gaseous atmospheric IVOCs. The method used two multi-sorbent traps that alternated for conducting sample collection and sample analysis. Compounds of C(12)C(22) n-alkanes and 2-4 ring PAHs were chosen as surrogates to evaluate the performance of this method. Regression coefficients of external calibration curves were greater than 0.93 and 0.96 for all individual n-alkanes and PAHs, respectively. Average relative standard deviation (RSD) values among replicate samples spiked at 3 ng for each individual standard were 9% +/- 5%. The detection limits of this method for individual n-alkanes and PAHs were 3.1-16.2 ng/m(3) and 1.0-2.7 ng/m(3), respectively. Atmospheric IVOCs were continuously monitored from September 28 to 30 and October 22 to November 9 in 2018, in an urban area of Shanghai. Besides targeted n-alkanes and PAHs, unspeciated complex mixtures (UCM) of IVOCs as well as total-IVOCs concentrations in the atmosphere were also determined. Measured concentrations and compositions of gaseous IVOCs in the atmosphere in this study were comparable to other similar studies" |
| Keywords: | Aerosols/analysis Alkanes/chemistry China Gas Chromatography-Mass Spectrometry/methods *Polycyclic Aromatic Hydrocarbons/analysis *Volatile Organic Compounds/analysis Gas chromatography/mass spectrometry (GC/MS) Intermediate volatile organic compounds (IV; |
| Notes: | "MedlineLu, Jun Li, Yingjie Li, Jie Jing, Sheng'ao An, Taikui Luo, Heng Ma, Changwen Wang, Hongli Fu, Qingyan Huang, Cheng eng Netherlands 2022/07/20 J Chromatogr A. 2022 Aug 16; 1677:463299. doi: 10.1016/j.chroma.2022.463299. Epub 2022 Jul 5" |
