PMID- 22520453 OWN - NLM STAT- MEDLINE DCOM- 20121026 LR - 20181201 IS - 1090-2414 (Electronic) IS - 0147-6513 (Linking) VI - 80 DP - 2012 Jun TI - Dissipation of pyraclostrobin and its metabolite BF-500-3 in maize under field conditions. PG - 252-7 LID - 10.1016/j.ecoenv.2012.03.012 [doi] AB - The dissipation and residue of pyraclostrobin and its metabolite BF-500-3 in maize under field conditions were investigated. A sensitive, simple and fast method for simultaneous determination of pyraclostrobin and BF-500-3 in maize matrix was established by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The average recoveries of pyraclostrobin and BF-500-3 were found in the range of 83.6-104.9% with relative standard deviations (RSDs) of 2.3-10.0%. The results showed that pyraclostrobin dissipated quickly in maize plant with half-lives of 1.6-1.7 days. Its metabolite BF-500-3 showed a tendency of rapid increasing initially and decreasing afterwards. At harvest time, the terminal residues of pyraclostrobin were below the maximum residue limit (MRL) set by USA and Canada in maize grain when measured 7 days after the final application, which suggested that the use of this fungicide was safe for humans. The results could provide guidance to safe and reasonable use of pyraclostrobin in agriculture. CI - Copyright (c) 2012 Elsevier Inc. All rights reserved. FAU - You, Xiangwei AU - You X AD - College of Science, China Agricultural University, Beijing 100193, PR China. FAU - Liu, Congyun AU - Liu C FAU - Liu, Fengmao AU - Liu F FAU - Liu, Yanping AU - Liu Y FAU - Dong, Jiannan AU - Dong J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120419 PL - Netherlands TA - Ecotoxicol Environ Saf JT - Ecotoxicology and environmental safety JID - 7805381 RN - 0 (Carbamates) RN - 0 (Fungicides, Industrial) RN - 0 (Pesticide Residues) RN - 0 (Pyrazoles) RN - 0 (Strobilurins) RN - DJW8M9OX1H (pyrachlostrobin) SB - IM MH - Agriculture MH - Canada MH - Carbamates/analysis/*metabolism MH - China MH - Chromatography, High Pressure Liquid MH - Environmental Monitoring MH - Fungicides, Industrial/analysis/chemistry/*metabolism MH - Half-Life MH - Pesticide Residues/analysis/chemistry/*metabolism MH - Pyrazoles/analysis/*metabolism MH - Strobilurins MH - Tandem Mass Spectrometry MH - United States MH - Zea mays/chemistry/*metabolism EDAT- 2012/04/24 06:00 MHDA- 2012/10/27 06:00 CRDT- 2012/04/24 06:00 PHST- 2011/12/03 00:00 [received] PHST- 2012/03/09 00:00 [revised] PHST- 2012/03/14 00:00 [accepted] PHST- 2012/04/24 06:00 [entrez] PHST- 2012/04/24 06:00 [pubmed] PHST- 2012/10/27 06:00 [medline] AID - S0147-6513(12)00099-1 [pii] AID - 10.1016/j.ecoenv.2012.03.012 [doi] PST - ppublish SO - Ecotoxicol Environ Saf. 2012 Jun;80:252-7. doi: 10.1016/j.ecoenv.2012.03.012. Epub 2012 Apr 19.