title: Perchlorate isotope forensics.
abstract: Perchlorate has been detected recently in a variety of soils, waters, plants, and food products at levels that may be detrimental to human health. These discoveries have generated considerable interest in perchlorate source identification. In this study, comprehensive stable isotope analyses (37Cl/35Cl and 18O/17O/16O) of perchlorate from known synthetic and natural sources reveal systematic differences in isotopic characteristics that are related to the formation mechanisms. In addition, isotopic analyses of perchlorate extracted from groundwater and surface water demonstrate the feasibility of identifying perchlorate sources in contaminated environments on the basis of this technique. Both natural and synthetic sources of perchlorate have been identified in water samples from some perchlorate occurrences in the United States by the isotopic method.
authors.affiliation: US Geological Survey, Reston, Virginia 20192, USA. jkbohlke@usgs.gov
authors.forename: John Karl
authors.initials: JK
authors.lastname: Böhlke
authors.forename: Neil C
authors.initials: NC
authors.lastname: Sturchio
authors.forename: Baohua
authors.initials: B
authors.lastname: Gu
authors.forename: Juske
authors.initials: J
authors.lastname: Horita
authors.forename: Gilbert M
authors.initials: GM
authors.lastname: Brown
authors.forename: W Andrew
authors.initials: WA
authors.lastname: Jackson
authors.forename: Jacimaria
authors.initials: J
authors.lastname: Batista
authors.forename: Paul B
authors.initials: PB
authors.lastname: Hatzinger