title: A modified technique for field measurements of dry deposition fluxes of polychlorinated biphenyls in tropical regions.
abstract: This report focused on the development of a technique to measure dry deposition fluxes of PCBs in tropical environments. Temperature resistant double-adhesive tape has been used as a new surrogate surface for collection of deposited PCBs. The new technique includes the measurement of field blanks for the entire sampling period. A sonication-assisted extraction procedure has been validated for the extraction of PCBs from the tape. The new technique has been used in the field for a period of 4 months in the tropical region of Singapore. The average dry deposition flux measured for total PCBs was 15.3 ng m(-2) day(-1) and, on a global scale, this can be considered to be low.
authors.affiliation: Tropical Marine Science Institute, National University of Singapore, 119223, Republic of Singapore. cveow@nus.edu.sg
authors.forename: Oliver
authors.initials: O
authors.lastname: Wurl
authors.forename: Jeffrey Philip
authors.initials: JP
authors.lastname: Obbard
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D015203:Reproducibility of Results; D012621:Seasons; D012846:Singapore; D014329:Tropical Climate
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D011078:Polychlorinated Biphenyls