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Dietary intake of toxic and essential trace elements by the children and parents living in Tokyo Metropolitan Area, Japan

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This study estimated the dietary intakes of 25 pairs of Japanese children and their parents to 12 toxic and essential trace elements using 7-day duplicate diet composites. The estimated intakes of lead (children=5.34µgday −1 , adults=6.74µgday −1 ) and tin (162 and 152µgday −1 ) were below tolerable limits, but large difference in aluminium intakes (7.32 and 12.1mgday −1 ) among the subjects warranted further investigations. Intakes of cadmium in both children and adults (13.2 and 15.9µgday −1 ) were high, but a low uranium (U) intake was observed (0.593 and 0.587µgday −1 ). Intakes of copper (567 and 784µgday −1 ), manganese (1.56 and 2.72mgday −1 ), zinc (4.93 and 6.75mgday −1 ), and molybdenum (103 and 131µgday −1 ) were close to the recommended values. Concentrations of chromium, nickel and selenium were lower than the detection limits in most cases.
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Keywords: Duplicate portion method; dietary intake; essential trace elements; toxic elements

Document Type: Research Article

Affiliations: 1: Institute of Environmental Studies, University of Tokyo, Hongo 7-3-1 Bunkyo-ku Tokyo 113-8656, Japan 2: Yokogawa Analytical Systems, Inc., 9-1 Takakura-cho, Hachioji, Tokyo 192-0033, Japan (YAN)

Publication date: September 1, 2006

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