Northern Center for Environmental Monitoring (NCEM), Vietnam Environment Administration (VEA), No.556 Nguyen Van Cu Street, Hanoi, Vietnam.
Faculty of Chemistry, Hanoi University of Science, Vietnam National University, 19 Le Thanh Tong, Hoan kiem, Hanoi, Vietnam.
Environ Sci Pollut Res Int. 2019 Oct;26(28):28852-28859. doi: 10.1007/s11356-019-06046-5. Epub 2019 Aug 5.
In this survey, food items were collected from vicinities of Bien Hoa and Da Nang airbase and determined for polychloro-dibenzo-dioxins and polychloro-dibenzo-furans (PCDD/Fs) to assess their accumulation, distribution in the local food items, and risk of PCDD/F exposure through consumption of the local foods. Dioxin compounds were determined using isotope dilution method which is slightly modified from US-EPA method 1613B. The dioxin concentration was the highest in fish followed by eggs, chicken, meat (pork and beef), and vegetables. Particularly, in Bien Hoa airbase, the mean concentrations of dioxin on TEQ and lipid basis (except for vegetables) were 26 pg/g for fish, 13 pg/g for eggs, 20 pg/g for chicken, 4.5 pg/g for meat, and 0.34 pg/g fresh wt for vegetables. In Da Nang airbase, the mean levels of dioxin on TEQ and lipid basis were slightly lower, 12.9 pg/g for fish, 8.7 pg/g for eggs, 5.9 pg/g for chicken, 6.7 pg/g for meat, and 0.17 pg/g for vegetables. It has been interesting to observe that free-range chicken expose to higher level of dioxin than caged chicken. In some free-range chicken, the portion of 2,3,7,8-TCDD was relatively high and implying recent exposure to dioxin.
在这项调查中，从边和和岘港空军基地附近采集了食物样本，并对其多氯二苯并二恶英和多氯二苯并呋喃（PCDD/Fs）进行了检测，以评估它们在当地食物中的积累、分布情况，以及通过食用当地食物而接触 PCDD/F 的风险。二恶英类化合物的测定采用了同位素稀释法，该方法是对美国环保署方法 1613B 的略微修改。在所有食物样本中，鱼类中二恶英类化合物的浓度最高，其次是蛋类、鸡肉、肉类（猪肉和牛肉）和蔬菜。特别是在边和空军基地，鱼类、蛋类、鸡肉、肉类和蔬菜（除蔬菜外）的 TEQ 和脂基平均浓度分别为 26 pg/g、13 pg/g、20 pg/g、4.5 pg/g 和 0.34 pg/g 鲜重。在岘港空军基地，鱼类、蛋类、鸡肉、肉类和蔬菜的 TEQ 和脂基平均浓度略低，分别为 12.9 pg/g、8.7 pg/g、5.9 pg/g、6.7 pg/g 和 0.17 pg/g 鲜重。有趣的是，散养鸡肉中二恶英类化合物的浓度比笼养鸡肉高。在一些散养鸡肉中，2,3,7,8-TCDD 的比例相对较高，这意味着最近接触过二恶英类化合物。
