title: A global survey of perfluorinated acids in oceans.
abstract: Perfluorinated acids and their salts have emerged as an important class of global environmental contaminants. Biological monitoring surveys conducted using tissues of marine organisms reported the occurrence of perfluorooctanesulfonate (PFOS) and related perfluorinated compounds in biota from various seas and oceans, including the Arctic and the Antarctic Oceans. Occurrence of perfluorinated compounds in remote marine locations is of concern and indicates the need for studies to trace sources and pathways of these compounds to the oceans. Determination of sub-parts-per-trillion (ng/L) or parts-per-quadrillion (pg/L) concentrations of aqueous media has been impeded by relatively high background levels arising from procedural or instrumental blanks. Our research group has developed a reliable and highly sensitive analytical method by which to monitor perfluorinated compounds in oceanic waters. The method developed is capable of detecting PFOS, perfluorohexanesulfonate (PFHS), perfluorobutanesulfonate (PFBS), perfluorooctanoate (PFOA), perfluorononanoate (PFNA), and perfluorooctanesulfonamide (PFOSA) at a few pg/L in oceanic waters. The method was applied to seawater samples collected during several international research cruises undertaken during 2002-2004 in the central to eastern Pacific Ocean (19 locations), South China Sea and Sulu Seas (five), north and mid Atlantic Ocean (12), and the Labrador Sea (20). An additional 50 samples of coastal seawater from several Asian countries (Japan, China, Korea) were analyzed. PFOA was found at levels ranging from several thousands of pg/L in water samples collected from coastal areas in Japan to a few tens of pg/L in the central Pacific Ocean. PFOA was the major contaminant detected in oceanic waters, followed by PFOS. Further studies are being conducted to elucidate the distribution and fate of perfluorinated acids in oceans.
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), 16-1, Onogawa, Tsukuba, Ibaraki 305-8569, Japan. nob.yamashita@aist.go.jp
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Yamashita
authors.forename: Kurunthachalam
authors.initials: K
authors.lastname: Kannan
authors.forename: Sachi
authors.initials: S
authors.lastname: Taniyasu
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Horii
authors.forename: Gert
authors.initials: G
authors.lastname: Petrick
authors.forename: Toshitaka
authors.initials: T
authors.lastname: Gamo
mesh_terms: D017738:Alkanesulfonic Acids / Q000032:analysis* / Q000633:toxicity; D000818:Animals; D002210:Caprylates / Q000032:analysis* / Q000633:toxicity; D004784:Environmental Monitoring / Q000379:methods / Q000706:statistics & numerical data*; D005399:Fishes / Q000378:metabolism*; D005466:Fluorocarbons / Q000032:analysis* / Q000633:toxicity; D007448:Invertebrates / Q000187:drug effects*; D008322:Mammals / Q000378:metabolism*; D009792:Oceans and Seas; D012623:Seawater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity
chemical_list: D017738:Alkanesulfonic Acids; D002210:Caprylates; D005466:Fluorocarbons; D014874:Water Pollutants, Chemical; C023036:perfluorooctanoic acid; C076994:perfluorooctane sulfonic acid