PMID- 26493991 OWN - NLM STAT- MEDLINE DCOM- 20160520 LR - 20190111 IS - 1573-2959 (Electronic) IS - 0167-6369 (Linking) VI - 187 IP - 11 DP - 2015 Nov TI - Dissipation, terminal residues and risk assessment of fluopicolide and its metabolite in cucumber under field conditions. PG - 698 LID - 10.1007/s10661-015-4924-5 [doi] AB - In this study, the dissipation, terminal residue levels, and risk assessment of fluopicolide and its metabolite (2,6-dichlorobenzamide) in cucumber and soil under field conditions were investigated. An analytical method for the simultaneous quantification of fluopicolide and its metabolite in cucumber and soil using gas chromatography coupled with electron capture detection (GC-ECD) was developed. Recoveries were between 78 and 111%, with relative standard deviations (RSDs) from 1.6 to 10.2% at different spiked levels (0.01, 0.025, 0.5, and 2 mg kg(-1)). The limit of quantification (LOQ) was 0.01 mg kg(-1). Fluopicolide exhibited half-lives ranging from 2.0 to 3.3 days and 35 to 63 days, in cucumber and soil under field ecosystem, respectively. The results suggested that the degradation of fluopicolide to 2,6-dichlorobenzamide was quite limited. During harvest, the terminal residues of fluopicolide and its metabolite were both below 0.13 mg kg(-1), which were lower than the established temporary maximum residue limits (MRLs), 0.5 mg kg(-1). The risk quotients (RQs) ranged from 0.0033 to 0.0078, which showed low risk for different groups of people in China. The present study may provide guidance on reasonable use of this pesticide and serve as a reference for establishment official MRLs in China. FAU - Shi, Kaiwei AU - Shi K AD - College of Science, China Agricultural University, Beijing, 100193, China. AD - State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China. FAU - Li, Wei AU - Li W AD - State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China. FAU - Yuan, Longfei AU - Yuan L AD - State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China. FAU - Li, Li AU - Li L AD - State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China. lili2008@ioz.ac.cn. FAU - Liu, Fengmao AU - Liu F AD - College of Science, China Agricultural University, Beijing, 100193, China. liufengmao@cau.edu.cn. LA - eng PT - Journal Article DEP - 20151022 PL - Netherlands TA - Environ Monit Assess JT - Environmental monitoring and assessment JID - 8508350 RN - 0 (Benzamides) RN - 0 (Pesticide Residues) RN - 0 (Soil) RN - 0 (Soil Pollutants) RN - 6TRO75M67P (fluopicolide) RN - E9JWF529EB (2,6-dichlorobenzamide) SB - IM MH - Benzamides/*analysis MH - China MH - Chromatography, Gas MH - Cucumis sativus/*metabolism MH - Ecosystem MH - *Environmental Monitoring MH - Half-Life MH - Pesticide Residues/*analysis MH - Risk Assessment MH - Soil/chemistry MH - Soil Pollutants/*analysis OTO - NOTNLM OT - Cucumber OT - Fluopicolide OT - Metabolite OT - Residue OT - Risk assessment EDAT- 2015/10/27 06:00 MHDA- 2016/05/21 06:00 CRDT- 2015/10/24 06:00 PHST- 2015/06/23 00:00 [received] PHST- 2015/10/13 00:00 [accepted] PHST- 2015/10/24 06:00 [entrez] PHST- 2015/10/27 06:00 [pubmed] PHST- 2016/05/21 06:00 [medline] AID - 10.1007/s10661-015-4924-5 [pii] AID - 10.1007/s10661-015-4924-5 [doi] PST - ppublish SO - Environ Monit Assess. 2015 Nov;187(11):698. doi: 10.1007/s10661-015-4924-5. Epub 2015 Oct 22.