title: An LC-MS/MS method for determination of novel fungicide pyraoxystrobin in rat plasma and tissues: Toxicokinetics and tissue distribution study.
abstract: A simple, specific and reproducible liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for the determination of pyraoxystrobin in rat plasma and tissues. Chromatographic separation was achieved on a Zorbax Extend-C18 column (50×2.1mm I. D., 3.5µm), using a gradient mobile phase consisting of acetonitrile and 0.1% aqueous formic acid (v/v) at a flow rate of 0.5mL min(-1). Pyraoxystrobin and picoxystrobin (internal standard) were detected without interference in the selected reaction monitoring (SRM) mode with positive electrospray ionization. Further, the method was validated following FDA guideline. The calibration curves for plasma and tissues were linear over a concentration range of 1.00-200ng mL(-1), with lower limits of quantitation of 1.00ng mL(-1). Mean extraction recoveries in plasma and tissues ranged from 101.4% to 108.2% and from 49.1% to 59.4%, respectively. The intra-day and inter-day precision in plasma and tissues were within 9.9% and 8.9%, and the intra-day and inter-day accuracy ranged from 88.7% to 110.7% and 93.2% to 108.7%, respectively. Finally, the validated method was successfully applied to toxicokinetics and tissue distribution studies after oral administration of pyraoxystrobin to rats.
authors.affiliation: Department of Analytical Chemistry, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China; Supervision and Test Center for Pesticide Safety Evaluation and Quality Control, 600 Shenliao Road, Shenyang 110141, China.
authors.forename: Li H
authors.initials: LH
authors.lastname: Lin
authors.affiliation: Supervision and Test Center for Pesticide Safety Evaluation and Quality Control, 600 Shenliao Road, Shenyang 110141, China.
authors.forename: Ming Y
authors.initials: MY
authors.lastname: Duan
authors.affiliation: Supervision and Test Center for Pesticide Safety Evaluation and Quality Control, 600 Shenliao Road, Shenyang 110141, China.
authors.forename: Guang
authors.initials: G
authors.lastname: Chen
authors.affiliation: Dalian GlycoBio Co. Ltd., 911 Huangpu Road, Dalian 116023, China.
authors.forename: Xiao H
authors.initials: XH
authors.lastname: You
authors.affiliation: Supervision and Test Center for Pesticide Safety Evaluation and Quality Control, 600 Shenliao Road, Shenyang 110141, China.
authors.forename: Chang L
authors.initials: CL
authors.lastname: Liu
authors.affiliation: Department of Analytical Chemistry, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China. Electronic address: gxjhyz@gmail.com.
authors.forename: Xing J
authors.initials: XJ
authors.lastname: Guo
mesh_terms: D000179:Acrylates / Q000032:analysis* / Q000097:blood / Q000493:pharmacokinetics / Q000633:toxicity; D000818:Animals; D002851:Chromatography, High Pressure Liquid; D005659:Fungicides, Industrial / Q000032:analysis* / Q000097:blood / Q000493:pharmacokinetics / Q000633:toxicity; D008297:Male; D011720:Pyrazoles / Q000032:analysis* / Q000097:blood / Q000493:pharmacokinetics / Q000633:toxicity; D017207:Rats, Sprague-Dawley; D021241:Spectrometry, Mass, Electrospray Ionization; D053719:Tandem Mass Spectrometry; D014018:Tissue Distribution; D066007:Toxicokinetics
chemical_list: C000590225:2-(2-((3-(4-chlorophenyl)-1-methyl-1H-pyrazol-5-yloxy)methyl)phenyl)-3-methoxyacrylate; D000179:Acrylates; D005659:Fungicides, Industrial; D011720:Pyrazoles
keywords: LC-MS/MS; Pyraoxystrobin; Strobilurin fungicides; Tissue distribution; Toxicokinetics