Distribution of thifluzamide, fenoxanil and tebuconazole in rice paddy and dietary risk assessment
Distribution of thifluzamide, fenoxanil and tebuconazole in rice paddy and dietary risk assessment
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DOI：
10.1080/02772248.2015.1113288
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发表时间：
2016-01-02
影响因子：
1.8
通讯作者：
Liu, Yihua
中科院分区：
文献类型：
--
作者：
Fu, Yan;Zheng, Zuntao;Liu, Yihua
以中国南部地区水稻为试材，研究了三种药剂在水稻上的分布行为。采用改良的QuEChERS法，用气相色谱(硫代磺胺和芬诺西尼)和液-质联用(戊唑醇)进行分析。噻唑胺和戊唑醇主要在土壤中分配，在水稻土中的半衰期分别为12-14天和5.3-7.8天。苯诺西尼主要在水稻植株中分配，半衰期为3.3-4.4天。在稻田水中的半衰期分别为0.17~0.89天、1.8~3.0天和1.6~4.0天。在收获前14天，稻米中的残留量均低于规定的最高限值。在收获前的间隔期，作为危险商数评估的饮食风险小于1。
Distribution behaviors of thifluzamide, fenoxanil, and tebuconazole applied to rice were investigated in South China. Analysis was by a modified QuEChERS method with gas chromatography (thifluzamide and fenoxanil) and liquid chromatography mass spectrometry (tebuconazole). Thifluzamide and tebuconazole partitioned mainly into the soil, with half-lives in the paddy soil of 12-14 and 5.3-7.8 days, respectively. Fenoxanil partitioned mainly into the rice plants, with half-lives of 3.3-4.4 days. The half-lives of thifluzamide, fenoxanil, and tebuconazole in paddy water were 0.17-0.89, 1.8-3.0, and 1.6-4.0 days, respectively. The residues in rice grains at the pre-harvest interval of 14 days were all below the established maximum limit values. The dietary risks assessed as hazard quotients at the pre-harvest interval were less than 1.