IP06 Passive Samplers for POPs
B115 & B116
8:00 AM - 12:00 PM, Tuesday
(IP044) Further evaluation of SPMDs as passive air samplers of semivolatile organic compounds.
Bartkow, M1, Kennedy, K1, Huckins, J2, Mueller, J1, 1 National Research Centre for Environmental Toxicology, University of Queensland, Brisbane, Queensland, Australia2 Columbia Environmental Research Centre, US Geological Survey, Columbia, Missouri, USA
ABSTRACT- Previous work has shown that SPMDs are useful as passive air samplers of semivolatile organic compounds such as PCBs, PAHs, and dioxins. However the following aspects of sampler performance required further investigation; 1) Are photosensitive compounds accumulated in the SPMD subject to photodegradation during the sampling period?; 2) If so, what sampler deployment device could limit this effect?; 3) Are particles sampled by the SPMD?; 4) If so, is uptake via a linear, first-order process?. We designed a field-based experiment to investigate these factors. SPMDs and HiVol air sampling systems were deployed at 2 sites. Performance reference compounds (PRCs) were added to the SPMDs prior to deployment. At Site 1 SPMDs were collected after 11, 20 and 29 days in order to determine sampling rates. These samplers were deployed in chambers designed to minimize exposure to reflected light. At Site 2 samplers were deployed in four different sampling chambers in order to ascertain the effects of photodegradation. Samplers at this site were collected after 29 days. In order to investigate whether the SPMDs sampled compounds from the particle phase the surface of each SPMD was cleaned and the surface wash extracted separately from the SPMD. Results will be discussed.
Key words: semivolatile organic compounds, passive air sampling, photodegradation, particles