Bioaccessibility and speciation of arsenic in country foods from contaminated sites in Canada
Bioaccessibility and speciation of arsenic in country foods from contaminated sites in Canada
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DOI：
10.1016/j.scitotenv.2013.01.047
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发表时间：
2013-04-01
影响因子：
9.8
通讯作者：
Reimer, Kenneth J.
中科院分区：
文献类型：
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作者：
Koch, Iris;Dee, Justin;Reimer, Kenneth J.
在污染地区通过觅食或狩猎获得的食物（乡村食物）中的砷尚未报告;此外，化学形式（砷形态）也不清楚。生物可及性提取可用于从样品中提取砷，提供有关可被人体吸收的砷的信息。从加拿大受污染的地点收集的乡村食物（浆果、其他植物、蘑菇和野兔）中测量了砷的生物可及性。还测定了生物可及性提取物中的砷形态。浆果中的砷浓度为0.06至21毫克/千克，拉布拉多茶中的砷含量为1.9毫克/千克（所有湿重）。蘑菇中砷浓度（湿重）高达46毫克/千克，但野兔肌肉组织中的砷浓度要低得多（0.007至0.6毫克/千克）。浆果和植物的生物可利用性最低（平均值为12-45%），其中砷的种类大多是有毒的无机砷。蘑菇和野兔肉的生物可及性较高（平均值为22-76%），其中沿着有毒无机砷，测量到相当大比例的毒性较低的有机砷物种，包括无毒的砷甜菜碱。蘑菇和野兔肉的物种形成模式是高度可变的。有毒形式的砷存在于从受污染地区收集的乡村食品中，但数量根据每种样品类型而有所不同。因此，理想情况下应针对新的样本类型和地点进行测试，以估计人类的暴露量。皇冠版权所有（C）2013由爱思唯尔B. V.出版保留所有权利。
Arsenic in foods obtained through foraging or hunting (country foods) in contaminated areas has not been reported; moreover the chemical form (arsenic speciation) is not known. Bioaccessibility extractions can be used to extract the arsenic from samples, giving information about the arsenic that is available for absorption into humans. Bioaccessibility of arsenic was measured in country foods (berries, other plants, mushrooms and hares) collected from contaminated sites in Canada. Arsenic speciation in the bioaccessibility extracts was also determined. Arsenic concentrations in berries ranged from 0.06 to 21 mg/kg, and Labrador tea contained 1.9 mg/kg of arsenic (all wet weight). Arsenic concentrations (wet weight) ranged up to 46 mg/kg in mushrooms, but they were much lower in hare muscle tissue (0.007 to 0.6 mg/kg). Percent bioaccessibility was lowest in berries and plants (means of 12-45%), where the arsenic species were mostly toxic inorganic arsenic. Bioaccessibility was higher in mushrooms and hare meat (means of 22-76%), where along with toxic inorganic arsenic, substantial proportions of less toxic organoarsenic species were measured, including non-toxic arsenobetaine. The speciation patterns were highly variable in both mushrooms and hare meat. Toxic forms of arsenic are present in country foods collected from contaminated areas, but the amounts vary according to and within each sample type. Therefore testing should ideally be carried out for new sample types and locations to estimate exposures to humans. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.