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Sci Total Environ

Title:		Extractable denuders for selective sampling of vapour phase organics in the atmosphere
Author(s):		Torre M; Tratzi P; Feo ML; Mosca S; Guerriero E; Paolini V;
Address:		"Institute of Atmospheric Pollution Research-National Research Council of Italy (IIA-CNR), SP35d, 00010 Monterotondo, RM, Italy. Institute of Atmospheric Pollution Research-National Research Council of Italy (IIA-CNR), SP35d, 00010 Monterotondo, RM, Italy. Electronic address: marialuisa.feo@iia.cnr.it"
Journal Title:		Sci Total Environ
Year:		2022
Volume:		20220913
Issue:
Page Number:		158744 -
DOI:		10.1016/j.scitotenv.2022.158744
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Extractable denuders were designed to collect trace atmospheric semivolatile organic compounds with high volume (38.30 and 200 L/ min) samplers. Denuders were made of multichannel ceramic support coated with sodium silicate and functionalised with phenyl moieties. Polycyclic aromatic hydrocarbons, polychlorinated biphenyls, polychlorinated dibenzodioxins and polychlorinated dibenzofurans and chlorobenzenes in ambient air of a sub-urban area of Monterotondo, Italy, were sampled. Samplings were of 24 h, 48 h and 1 week period. Precision was determined using field triplicates and compared to the conventional high volume sampler methods. The fraction of analytes in the particle phase measured with the filter/ PUF system ranged from 0.2 % for naphthalene to 98.5 % for benzo(ghi)perylene; this fraction measured with the denuder ranged from 0.5 % for naphthalene to 99.0 % for benzo(ghi)perylene. A paired t-test indicated that these values were significantly (t = 3.58, P < 0.01) higher for the denuder. Results showed good repeatability (0.4-4.6 %), sampling efficiency (>99 %) and good capacity as variations in experimental efficiency were not observed also for longer (1 week) period sampling. As significant changes in efficiency were observed (0.7-5.6 %), the developed denuder cannot be reused more than once. However, it is possible to regenerate the denuder with a new silanization step. A good linear correlation was found plotting the vapour/particle distribution ratio versus the vapour pressure (R(2) ranged between 0.59 and 0.84) and versus the octanol/air partition coefficient (R(2) ranged between 0.85 and 0.88) of each selected SVOCs, in good agreement with the theoretical models for partitioning of SVOCs"
Keywords:		Atmospheric environment Denuder Gas-particle partitioning Semi-volatile organic compounds;
Notes:		"PublisherTorre, Marco Tratzi, Patrizio Feo, Maria Luisa Mosca, Silvia Guerriero, Ettore Paolini, Valerio eng Netherlands 2022/09/16 Sci Total Environ. 2022 Sep 13; 854:158744. doi: 10.1016/j.scitotenv.2022.158744"