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Atmospheric Concentrations of Captan and Folpet in the Lower Fraser Valley Agricultural Region of Canada

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Author(s): R. Raina | Wayne Belzer | Keith Jones

Journal: Air, Soil and Water Research
ISSN 1178-6221

Volume: 2;
Start page: 41;
Date: 2009;
Original page

Keywords: fungicides | atmospheric transport | particle and gas phase partitioning | captan | folpet

ABSTRACT
Two N-trihalomethylthio fungicides were detected in the atmosphere in the Lower Fraser Valley agricultural region of Canada. Captan was detected in both the particle and gas phase with a dominant particle phase fraction observed in both 2005 and 2006 (only total captan atmospheric concentrations were available for 2004). This provides the first evidence of particle transport as a significant atmospheric transport pathway for captan in an agricultural region in Canada. Weekly captan air concentrations reached maximum levels of 13.2 ng m-3 in June 2006, while for folpet total atmospheric levels were lower with maximum reaching 1.7 ng m-3 in August 2004 and generally
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