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Chemical and Toxicologic Assessment of Organic Contaminants in Surface Water Using Passive Samplers

^a U.S. Geological Survey Columbia Environmental Research Center, 4200 New Haven Road, Columbia, MO 65201
^b U.S. Geological Survey, MS 433, National Center, 12201 Sunrise Valley Dr., Reston, VA 20192

View larger version (76K): [in this window] [in a new window]   Fig. 1. Field deployment canisters. (A) Polar organic chemical integrative sampler (POCIS) deployment canister with six POCIS mounted on a support rod that secures the samplers inside the canister. (B) Semipermeable membrane device (SPMD) deployment canister containing five SPMDs (cover removed to show SPMDs secured on racks).

View larger version (22K): [in this window] [in a new window]   Fig. 2. Laboratory processing scheme for field-deployed and quality-control polar organic chemical integrative sampler (POCIS) and semipermeable membrane device (SPMDs). GC-ECD, gas chromatograph electron capture detector; GC-MSD, gas chromatograph-mass selective detector; OC, organochlorine; PAH, polycyclic aromatic hydrocarbon; PCB, polychlorinated biphenyl; SEC, size exclusion chromatography; YES, yeast estrogen screen.