title: Analysis of halogenated C1/C2-trace compounds in marine atmosphere.
abstract: Patterns of volatile ECD-active substances in marine air at the ultra trace level were investigated. The protocol used carbon based adsorbents, thermodesorption and thick film HRGC-ECD together with a second ECD in line with oxygen doped make-up gas. The latter ECD mode leads to an increased sensitivity for chloromethane. dichloromethane, and other important chlorinated substances with an otherwise low response at an ECD driven with oxygen-free nitrogen or argon/methane. The experimental set-up is easily to employ. Air samples were taken on two cruises of the German research vessel R/V "Polarstem" in the Atlantic Ocean to determine the background pattern of all volatile halocarbons from CF3Cl to CHI3 in marine air.
authors.affiliation: Department of Analytical and Environmental Chemistry, University of Ulm, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Urhahn
authors.forename: K
authors.initials: K
authors.lastname: Ballschmiter
mesh_terms: D001267:Atlantic Ocean; D001272:Atmosphere / Q000737:chemistry*; D017402:Chlorofluorocarbons / Q000032:analysis*; D017752:Greenhouse Effect; D006847:Hydrocarbons, Iodinated / Q000032:analysis; D008737:Methyl Chloride / Q000032:analysis*; D008752:Methylene Chloride / Q000032:analysis*; D010126:Ozone; D012680:Sensitivity and Specificity
chemical_list: D017402:Chlorofluorocarbons; D006847:Hydrocarbons, Iodinated; D008752:Methylene Chloride; D010126:Ozone; D008737:Methyl Chloride; C010473:iodoform