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Indoor and Built Environment, Vol. 8, No. 4, 255-268 (1999)
DOI: 10.1177/1420326X9900800407

A Survey of Indoor Pollution by Volatile Organohalogen Compounds in Katsushika, Tokyo, Japan

Takashi Amagai

University of Shizuoka, Shizuoka, Japan

Olansandan

University of Shizuoka, Shizuoka, Japan

Hidetsuru Matsushita

University of Shizuoka, Shizuoka, Japan

Masashi Ono

National Institute for Environmental Studies, lbaraki, Japan

Satoshi Nakai

Yokohama National University, Yokohama, Japan

Kenji Tamura

National Institute for Minamata Disease, Kumamoto, Japan

Kazuho Maeda

Tokyo Kasel University, Tokyo, Japan

A survey of indoor and outdoor pollution by 10 volatile organohalogen compounds (VOHCs) was performed in Katsushika Ward, Tokyo, Japan. Thirteen houses in Feb ruary and 30 houses in July were sampled. Four consec utive 24-hour samples were collected by passive sam pling from living room, kitchen, bedroom, bathroom and outdoors in February and July 1995. Indoor concentra tions of carbon tetrachloride and trichloroethylene were at nearly the same as outdoor concentrations; therefore, it was concluded that indoor pollution by these com pounds was primarily due to penetration of outdoor pol lutants. Indoor concentrations of some VOHCs were con siderably higher than outdoor concentrations and they varied widely between households. The list included: p- dichlorobenzene, tetrachloroethylene and trihalometh anes, for which emission sources were insect repellents, dry-cleaned clothes, and tap water, showers and bathtub water, respectively. Indoor concentrations of these com pounds were higher in reinforced concrete houses than in wooden houses or wooden houses with mortar walls. This suggests that airtightness of the rooms is responsi ble for high indoor VOHC concentrations.

Key Words: Passive sampler • Volatile organohalogen compounds • Electron capture detection • Gas chromatography • Indoor pollution


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