A Simple Method for Sampling and Analysis of Particulate, Inorganic Gaseous and Organic Gaseous Halogens in the Atmosphere

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  • Akata Naofumi
    National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
  • Tsukada Hirofumi
    Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima, Fukushima 960-1296, Japan
  • Takahashi Tomoyuki
    Kyoto University Research Reactor Institute, 2 Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
  • Fukutani Satoshi
    Kyoto University Research Reactor Institute, 2 Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan

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<p>A simple method for simultaneous sampling and analysis of particulate, inorganic and organic gaseous halogens, Cl, Br and I, in the atmosphere was reported. The sampling system consisted of three kinds of filters of 47 mm φ which were supported in a Norwegian Institute for Air Research (NILU) filter holder system connected in series. Fine and coarse particulate halogens were collected on separate fluoropore filters with a cascade impactor. Inorganic gaseous halogens were sampled with three cellulose filters impregnated with 1 M LiOH in a 10% glycerol water mixture. Organic gaseous halogens were absorbed in three activated charcoal paper filters. An outdoor air sample was passed at a flow rate of 10 L min-1 every two weeks. After sample collection, each filter sample was separately sealed in a polyethylene bag, and analyzed for Cl, Br and I with an instrumental neutron activation analysis (NAA) using the Kyoto University Research Reactor (KUR). Recoveries of inorganic and organic gaseous halogens in this system were greater than 80%. Atmospheric I concentrations of coarse and fine particulate, inorganic and organic gaseous were between 0.17 - 0.52, 0.46 - 1.38, 1.50 - 3.44 and 1.66 - 5.94 ng m-3, respectively. Those of Br were between 6.94 - 14.03, 1.74 - 3.92, 8.59 - 12.68 and 6.65 - 17.05 ng m-3, respectively. And those of Cl ranged between 1980 - 4600, 5.72 - 23.16, 318 - 647 and 25.0 - 115 ng m-3, respectively.</p>

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