Do Storage Conditions Affect Collected Cookstove Emission Samples? Implications for Field Studies.

Autor: Mutlu E; Center for Computational Toxicology and Exposure, U.S. EPA, RTP, NC, USA.; Division of the Translational Toxicology, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA., Cristy T; Battelle, Columbus, OH, USA., Stiffler B; Battelle, Columbus, OH, USA., Waidyanatha S; Division of the Translational Toxicology, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA., Chartier R; RTI International, RTP, NC, USA., Jetter J; Center for Environmental Measurement and Modelling, U.S. EPA, RTP, NC, USA., Krantz T; Center for Environmental Measurement and Modelling, U.S. EPA, RTP, NC, USA., Shen G; Center for Environmental Measurement and Modelling, U.S. EPA, RTP, NC, USA., Champion W; Oak Ridge Institute for Science and Education (ORISE) Postdoctoral Fellow at U.S. EPA, Office of Research and Development, Center for Environmental Measurement and Modelling, RTP, NC, USA., Miller B; Battelle, Columbus, OH, USA., Richey J; Battelle, Columbus, OH, USA., Burback B; Battelle, Columbus, OH, USA., Rider CV; Division of the Translational Toxicology, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA.
Jazyk: angličtina
Zdroj: Analytical letters [Anal Lett] 2023; Vol. 56 (12), pp. 1911-1931. Date of Electronic Publication: 2022 Dec 20.
DOI: 10.1080/00032719.2022.2150772
Abstrakt: Cookstove emissions are a significant source of indoor air pollution in developing countries and rural communities world-wide. Considering that many research sites for evaluating cookstove emissions and interventions are remote and require potentially lengthy periods of particulate matter (PM) filter sample storage in sub-optimal conditions (e.g., lack of cold storage), an important question is whether samples collected in the field are stable over time. To investigate this, red oak was burned in a natural-draft stove, and fine PM (PM 2.5 ) was collected on polytetrafluoroethylene filters. Filters were stored at either ambient temperature or more optimal conditions (-20°C or -80°C) for up to 3 months and extracted. The effects of storage temperature and length on stability were evaluated for measurements of extractable organic matter (EOM), PM 2.5 , and polycyclic aromatic compound (PAC) levels in the filter extracts. A parallel, controlled laboratory condition was also evaluated to further explore sources of variability. In general, PM 2.5 and EOM in both simulated field and laboratory samples were similar regardless of the storage condition or duration. The extracts were also analyzed by gas chromatography to quantify 22 PACs and determine similarities and/or differences between the conditions. PAC levels were a more sensitive stability measure in differentiating between storage conditions. The findings suggest that measurements are relatively consistent across storage duration/temperatures for filter samples with relatively low EOM levels. This study aims to inform protocols and filter storage procedures for exposure and intervention research conducted in low- and middle-income countries where studies may be budget- and infrastructure-limited.
Competing Interests: The authors declare no competing financial interest.
Databáze: MEDLINE
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