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ESTIMATION OF DAILY INTAKE OF FOUR KINDS OF TRIHALOMETHANE BY JAPANESE HOUSEWIVES |
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| Authors: | MASATAKE TOYODA KAYOKO TAKAGI AKIO TSURUMIZU YUKIO SAITO HIROSHI KIKAWA TARO KAWAMURA YOSHIO SAKABE |
| Affiliation: | Division of Foods National Institute of Hygienic Sciences 18–1, Kamiyoga, 1-chome Setagaya-ku Tokyo 158, Japan;Yokohama City Institute of Health 1–2–17, Takigashira, Isogo-ku Yokohama, Japan;Nagoya City Health Research Institute 11–1, Hagiyama-cho, Mizuho-ku Nagoya 460, Japan |
| Abstract: | Duplicate portions of the daily meals consumed by 30 housewives were collected for 3 consecutive days in the cities of Nagoya and Yokohama in Japan. Meals were analyzed for chloroform, bromodichloromethane (BDCM), chlorodibromomethane (CDBM) and bromoform by using a purge-trap procedure. The average concentration (and the range) of these four kinds of trihalomethane in each of the 24 h duplicate meals were, chloroform 19.6±18.1 ppb(n.d.-106.8 ppb), BDCM 0.3±0.3 ppb(n.d.-1.7 ppb), CDBM 0.1±0.2 ppb(n.d.-0.6 ppb) and bromoform 0.5±1.3 ppb(n.d.-8.1 ppb). The mean daily dietary intake of the four kinds of trihalomethane by housewives were, chloroform 40.0±25.4 μg, BDCM 0.6±0.5 μg, CDBM 0.3±0.3 μg and bromoform 0.9±1.3 μg. |
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