PMID- 29777494 OWN - NLM STAT- MEDLINE DCOM- 20190102 LR - 20210130 IS - 1614-7499 (Electronic) IS - 0944-1344 (Linking) VI - 25 IP - 21 DP - 2018 Jul TI - Residue behavior and risk assessment of thifluzamide in the maize field ecosystem. PG - 21195-21204 LID - 10.1007/s11356-018-2211-z [doi] AB - In the present work, the dissipation kinetics and final residue levels of thifluzamide in the maize field ecosystem were investigated. Using a modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) extraction combined with liquid chromatography-tandem mass spectrometric detection (LC-MS/MS), a rapid, sensitive, efficient, and reliable method for extraction and quantitative analysis of thifluzamide residues in maize grain, maize plant, and soil was developed. Satisfactory recoveries of 78.7-97.0% were achieved with relative standard deviations (RSDs) in the range of 1.6 to 8.2%. The limits of detection (LODs) and the limit of quantification (LOQ) were 0.002-0.005 and 0.010 mg kg(-1), respectively. The dissipation kinetics of thifluzamide in maize plant was well fitted by the first-order kinetic model with short half-lives of 0.19-0.22 days, while thifluzamide degraded slowly in soil with half-lives of 4.56-15.85 days. The final residues in maize grain, maize plant, and soil samples collected at the milk stage and the physiological maturity stage were no more than 0.010, 0.807, and 0.278 mg kg(-1), respectively. Given that no maximum residue limit (MRL) for thifluzamide in maize has been established, the safety of this fungicide application was estimated by a dietary risk assessment. The hazard quotient was 0.03%, which was substantially less than 1, indicating that the long-term risk induced by the thifluzamide application on maize at the recommended dose is negligible. These results help governments to develop regulations for the safe use of thifluzamide. FAU - Ma, Cong AU - Ma C AD - Food Science and Technology, Grain College, Henan University of Technology, Zhengzhou, 450052, People's Republic of China. AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. FAU - Liu, Zhongdong AU - Liu Z AD - Food Science and Technology, Grain College, Henan University of Technology, Zhengzhou, 450052, People's Republic of China. liuzhongdong2345@163.com. FAU - Qi, Yan AU - Qi Y AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. FAU - Wang, Shanshan AU - Wang S AUID- ORCID: 0000-0002-9289-8174 AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. wangshanshan@caas.cn. FAU - Cao, Xiaolin AU - Cao X AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. FAU - Wang, Jing AU - Wang J AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. w_jing2001@126.com. FAU - She, Yongxin AU - She Y AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. FAU - Shao, Yong AU - Shao Y AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. FAU - Shen, Jitai AU - Shen J AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. FAU - Zhang, Chao AU - Zhang C AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. FAU - Jiang, Zejun AU - Jiang Z AD - Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. LA - eng GR - 31401590/National Natural Science Foundation of China/ GR - 2016YFD0400800/National Key R&D Program of China/ GR - 1610072017007/Central Public-interest Scientific Institution Basal Research Fund/ PT - Evaluation Study PT - Journal Article DEP - 20180518 PL - Germany TA - Environ Sci Pollut Res Int JT - Environmental science and pollution research international JID - 9441769 RN - 0 (Anilides) RN - 0 (Pesticide Residues) RN - 0 (Soil) RN - 0 (Soil Pollutants) RN - 0 (Thiazoles) RN - 2J3TB6Z254 (thifluzamide) SB - IM MH - Anilides/*chemistry MH - Chromatography, Liquid/*methods MH - Ecosystem MH - Half-Life MH - Kinetics MH - Limit of Detection MH - Pesticide Residues/*chemistry MH - Soil/chemistry MH - Soil Pollutants/*chemistry MH - Tandem Mass Spectrometry/*methods MH - Thiazoles/*chemistry MH - Zea mays/chemistry/*growth & development OTO - NOTNLM OT - Dissipation behavior OT - Final residues OT - LC-MS/MS OT - Maize OT - Modified QuEChERS extraction OT - Risk assessment OT - Thifluzamide EDAT- 2018/05/20 06:00 MHDA- 2019/01/03 06:00 CRDT- 2018/05/20 06:00 PHST- 2018/01/08 00:00 [received] PHST- 2018/05/01 00:00 [accepted] PHST- 2018/05/20 06:00 [pubmed] PHST- 2019/01/03 06:00 [medline] PHST- 2018/05/20 06:00 [entrez] AID - 10.1007/s11356-018-2211-z [pii] AID - 10.1007/s11356-018-2211-z [doi] PST - ppublish SO - Environ Sci Pollut Res Int. 2018 Jul;25(21):21195-21204. doi: 10.1007/s11356-018-2211-z. Epub 2018 May 18.