Residues, dissipation and risk assessment of triazole fungicide tebuconazole in green onion (Allium fistulosumL.)
文献类型： 外文期刊
作者： Zhao, Junlong 1 ; Tan, Zhenchao 1 ; Wen, Yan 1 ; Fan, Shuai 1 ; Gao, Yan 3 ; Liu, Chenglan 1 ;
作者机构： 1.South China Agr Univ, Key Lab Nat Pesticide & Chem Biol, Minist Agr, Guangzhou, Peoples R China
2.South China Agr Univ, Key Lab Biopesticide Innovat & Applicat Guangdong, Guangzhou, Peoples R China
3.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangdong Prov Key Lab High Technol Plant Protect, Guangzhou, Peoples R China
关键词： Tebuconazole; green onion; terminal residue; dissipation behaviour; dietary risk assessment
期刊名称：INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY （ 2020影响因子：2.826； 五年影响因子：2.215 ）
ISSN： 0306-7319
收录情况： SCI
摘要： The dissipation and residues of tebuconazole in green onion (welsh onion and chive) in China were firstly investigated based on a quick, easy, cheap, effective, rugged and safe method (QuEChERS) combined with high-performance liquid chromatography-ultraviolet detector (HPLC-UV). In the method validation, the fortified recoveries ranged from 96% to 100% with relative standard deviations of <= 10%. The dissipation rate of tebuconazole follows the first-order kinetics, with the half-lives of 9.4-9.9 days. Based on the terminal residue test, a risk quotient (RQ) for dietary exposure assessment was carried out on green onions. The RQs for tebuconazole at pre-harvest interval (PHI) 7, 10 and 14 days were all less than 100%, which is acceptable for human consumption. The present study can provide a reference that establishes maximum residue limits (MRLs) of tebuconazole in green onion, which is not currently established in China.
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