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. 2019 Jul 24;9:10733. doi: 10.1038/s41598-019-47086-8

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Non-filtered and filtered mercuric halides concentrations by PFA-preconcentration mercury mass spectrometry in Montreal urban air. Gaseous oxidized mercury (GOM) measurements by KCl denuder and gaseous elemental mercury (GEM) measurements by CVAFS. Ozone, total precipitation, snow on the ground and PM_2.5 measurements from 400 m away. gaseous elemental mercury is strongly negatively correlated with ozone (ρ = −0.67, p = 0.01) and moderately correlated with PM_2.5 (ρ = −0.57, p = 0.04).