A market basket survey for trace metal intake was carried out in Shizuoka city, Japan. Contents of 14 trace metals (Be, V, Cr, Mn, Co, Ni, Sr, Mo, Ag, Sn, Sb, Cs, Ba, and U) in food composites prepared from 154 food items of 20 food categories were analyzed by acid-digestion followed by ICP mass spectrometric determination. Trace metal concentrations were variable according to the 20 food composites; “Supplements & foods for specified health uses (S-FOSHU)”, “Algae” and “Nuts & seeds” were the composites in which many trace metals were found at higher concentration. The trace metal intake from each food category and total daily intake was estimated by multiplying trace metal concentration in the food composite and corresponding daily consumption statistics obtained from National Health and Nutrition Survey of Japan. Daily intake of trace metal was estimated from this survey to be 0.14 (0.064), 3.8 (3.5), 0.42 (0.33), 2.2 (1.9), 0.30 (0.29), 2.5 (2.5), and 0.56 (0.48) mg/day for Cr, Mn, Ni, Sr, Mo, Sn and Ba, respectively, and 2.6 (2.3), 36 (26), 15 (11), 2.8 (2.6), 1.7 (1.5), 8.0 (7.8), and 4.9 (2.0) μg/day for Be, V, Co, Ag, Sb, Cs and U, respectively (Since “S-FOSHU” substantially contributed to total daily intake of some metals but the representativeness of its contribution was not clear, total daily intake was estimated without “S-FOSHU” and shown in parenthesis). The estimated total daily intake was generally in agreement with the previously reported values. “S-FOSHU”, “Seasonings & spices” and “Vegetable” were the categories contributed much to total daily intake of many trace metals. Hazard quotient (HQ) was calculated for each metal based on Tolerable Daily Intake (TDI) proposed by US Environmental Protection Agency and other authorities. The HQ of Mo reached 1.0 and that for V, Mn, Ni and U was between 0.1 and 1.0, suggesting the necessity of screening of intake of these metals on individual basis to characterize more of their potential health risks.
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