| Title: | Quartz filter-based thermal desorption gas chromatography mass spectrometry for in-situ molecular level measurement of ambient organic aerosols |
| Author(s): | Ren H; Xue M; An Z; Zhou W; Jiang J; |
| Address: | "State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China. Electronic address: jiangjk@tsinghua.edu.cn" |
| DOI: | 10.1016/j.chroma.2019.01.010 |
| ISSN/ISBN: | 1873-3778 (Electronic) 0021-9673 (Linking) |
| Abstract: | "Thermal desorption aerosol gas chromatography (TAG) is an effective technique for online chemical characterization of organics in atmospheric fine particulate matter (PM(2.5)) on the molecular level. Unlike the previously reported impactor- or metal filter-based TAG, in this study, a replaceable quartz filter-based TAG (Q-TAG) was developed to achieve online measurement of organic constituents in ambient PM(2.5). A homemade device for automatic online sampling and pretreatment of aerosols was developed and coupled with gas chromatography-mass spectrometry (GC-MS) by a 4-port valve. Performance of the Q-TAG system was evaluated using C7 - C40 n-alkanes to cover a wide range of volatility. C11 - C40 could be measured by Q-TAG. The response of their peaks depends on their volatility and thermal desorption conditions (the desorption time and the flow rate). Under the optimized conditions, good precision (<12%), acceptable linearity (R(2)> 0.98) and high sensitivity (detection limits from 0.02 to 0.01 ng) of C13 - C40 were obtained. The developed Q-TAG system was applied for online analysis of organic species in ambient PM(2.5). The Q-TAG is suitable for detection of semi and low volatile organic species in particulate matter, and its filter can be easily changed, making it a useful tool in molecular characterization of ambient organic aerosols" |
| Keywords: | Aerosols/*analysis Air Pollutants Alkanes Environmental Monitoring Gas Chromatography-Mass Spectrometry/*methods Organic Chemicals/*analysis Particulate Matter Quartz Volatile Organic Compounds/*analysis Airborne fine particles Gas chromatograph/mass spec; |
| Notes: | "MedlineRen, Haixia Xue, Mo An, ZhaoJin Zhou, Wei Jiang, Jingkun eng Netherlands 2019/01/16 J Chromatogr A. 2019 Mar 29; 1589:141-148. doi: 10.1016/j.chroma.2019.01.010. Epub 2019 Jan 7" |
