Dietary arsenic intake in Taiwanese districts with elevated arsenic in drinking water

被引:76
作者
Schoof, RA
Yost, LJ
Crecelius, E
Irgolic, K
Goessler, W
Guo, HR
Greene, H
机构
[1] PTI Environm Serv, Bellevue, WA 98007 USA
[2] Battelle Marine Sci, Sequim, WA 98382 USA
[3] Karl Franzens Univ Graz, Inst Analyt Chem, A-8010 Graz, Austria
[4] Natl Cheng Kung Univ, Dept Environm & Occupat Hlth, Coll Med, Tainan 70428, Taiwan
[5] ARCO Corp, Los Angeles, CA 90071 USA
来源
HUMAN AND ECOLOGICAL RISK ASSESSMENT | 1998年 / 4卷 / 01期
关键词
Taiwan; arsenic; speciation; dietary;
D O I
10.1080/10807039891284235
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
Inorganic arsenic in dietary staples (i.e., yams and rice) may have substantially contributed to exposure and adverse health effects observed in an endemic Taiwanese population historically exposed to arsenic in drinking water. Observations of this population were used by the U.S. Environmental Protection Agency to derive toxicity values that form the basis for arsenic risk assessment and various regulations in the United States. However, data were previously insufficient to accurately estimate dietary intake. Rice and yam samples collected in 1993 and 1995 from Taiwanese districts with endemic arsenic were analyzed for total arsenic and for inorganic and organic mono- and dimethylarsenic. The acid digestion techniques used in the analyses are among the best to preserve organic arsenic in the test sample. Furthermore, concurrent analyses of the proportion of inorganic arsenic in split samples of rice and yams collected in the 1995 investigation were in good agreement, despite using a different digestion method. These data support a likely mean dietary intake of 50 mu g/day with a range of 15 to 211 mu g/day. Consideration of dietary intake may result in a downward revision of the assumed potency of ingested arsenic as reflected in EPA's toxicity values.
引用
收藏
页码:117 / 135
页数:19
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