1. Applied Environmental Research Laboratories (AERL), Department of Chemistry, Vancouver Island University, Nanaimo, British Columbia, V9R 5S5, Canada
2. Department of Chemistry, University of Victoria, Victoria, British Columbia, V8P 5C2, Canada
3. Department of Chemistry, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
4. Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington 98195, USA