title: A simplified method for sampling and analysis of high volume surface water for organic contaminants using XAD-2.
abstract: A simple compressed-gas driven system for field processing and extracting water for subsequent analyses of hydrophobic organic compounds is presented. The pumping device is a pneumatically driven pump and filtration system that can easily clarify at 4 L/min. The extraction device uses compressed gas to drive filtered water through two parallel XAD-2 resin columns, at about 200 mL/min. No batteries or inverters are required for water collection or processing. Solvent extractions were performed directly in the XAD-2 glass columns. Final extracts are cleaned-up on Florisil cartridges without fractionation and contaminants analyzed by GC-MS. Method detection limits (MDLs) and recoveries for dissolved organic contaminants, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and pesticides are reported along with results of surface water analysis for the San Francisco Bay, CA.
authors.affiliation: Environmental Chemistry Laboratory, University of Maine, Sawyer Environmental Research Center, Orono, Maine, USA. sdatta@usgs.gov
authors.forename: Seema
authors.initials: S
authors.lastname: Datta
authors.forename: Luat V
authors.initials: LV
authors.lastname: Do
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Young
mesh_terms: D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods*; D005618:Fresh Water / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D057927:Hydrophobic and Hydrophilic Interactions; D007475:Ion Exchange Resins; D010575:Pesticides / Q000032:analysis; D011078:Polychlorinated Biphenyls / Q000032:analysis; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis; D011137:Polystyrenes; D011786:Quality Control; D012495:San Francisco; D012680:Sensitivity and Specificity; D014877:Water Pollution, Chemical / Q000032:analysis*
chemical_list: D007475:Ion Exchange Resins; D010575:Pesticides; D011084:Polycyclic Aromatic Hydrocarbons; D011137:Polystyrenes; C003771:Amberlite XAD-2 resin; D011078:Polychlorinated Biphenyls