- Title
- Application of portable gas chromatography–mass spectrometer for rapid field based determination of TCE soil vapour and groundwater
- Creator
- Wang, Liang; Cheng, Ying; Naidu, Ravi; Chadalavada, Sreenivasulu; Bekele, Dawit; Gell, Peter; Donaghey, Mark; Bowman, Mark
- Relation
- Environmental Technology and Innovation Vol. 21, Issue February 2021, no. 101274
- Publisher Link
- http://dx.doi.org/10.1016/j.eti.2020.101274
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2021
- Description
- The application of portable chromatography–mass spectrometer (GC–MS) is restrained by its detection limits without the development of proper sample pre-concentration methods. The primary focus of this paper is to introduce a practical field measurement methodology for the analysis of volatile organic compounds (VOCs) in soil vapour and groundwater using a portable gas (GC–MS)system for application to in situ assessment of vapour intrusion from VOC contamination. A solid-phase micro-extraction (SPME) technique was applied for sample pre-concentration before the GC–MS measurement. Practical in-field soil gas SPME sampling methods have been developed to optimise the SPME extraction efficiency to then ultimately improve the detection limits of portable GC–MS. An Australian site impacted by a chlorinated VOC, trichloroethylene (TCE), was the subject of the case study. To rapidly assess soil vapour samples in subsurface soil, in-house-developed retractable soil vapour sampling probes (SVSPs) were installed at the site in clusters at depths of 1 m, 2 m and 3 m below ground level at each sampling location. Use of the SVSPs for sampling enabled the generation of a three-dimensional map and distribution contours for TCE concentrations using the in situ measurement results of a portable GC–MS analysis for vapour intrusion investigation. The results of the portable GC–MS analysis were compared with the results from conventional USEPA methods, such as TO-15 and Method 8265 for soil vapour and groundwater samples, respectively. This work demonstrates that the developed methodology of using a portable GC–MS system has the capability for in-field quantitative analysis of VOCs for rapid contaminated site vapour intrusion assessment.
- Subject
- portable gas chromatography massspectrometer; trichloroethylene; retractable soil vapour sampling probe; three-dimensional mapping; solid phasemicro extraction; vapour intrusion; SDG 6; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1471436
- Identifier
- uon:48678
- Identifier
- ISSN:2352-1864
- Language
- eng
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