A retrospective analysis was conducted on air samples that were collected in 2005 under the Global Atmospheric Passive Sampling (GAPS) Network around the time period when the Stockholm Convention on Persistent Organic Pollutants came into force. Results are presented for several new flame retardants, including hexabromocyclododecane (HBCD), which was recently listed under the Convention (2013). These results represent the first global-scale distributions in air for these compounds. The targeted compounds are shown to have unique global distributions in air, which highlights the challenges in understanding the sources and environmental fate of each chemical, and ultimately in their assessments as persistent organic pollutants. The study also demonstrates the feasibility of using the PUF disk passive air sampler to study these new flame retardants in air, many of which exist entirely in the particle-phase as demonstrated in this study using a KOA-based partitioning model.

Atmospheric Science and Technology Directorate Environment Canada Toronto Ontario M3H 5T4 Canada

Facultad de Ciencias Universidad Católica Santísima Concepción Alonso de Ribera 2850 P C 407 01 29 Concepción Chile; RECETOX Research Center for Toxic Compounds in the Environment Masaryk University Kamenice 3 126 625 00 Brno Czech Republic

Water Science and Technology Directorate Environment Canada Burlington Ontario L7R 4A6 Canada

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