title: Enantioselective degradation of indoxacarb from different commercial formulations applied to tea.
abstract: The stereoselective degradation of indoxacarb enriched with (+)-S-indoxacarb (S/R:70/30) was investigated in three typical green teas. A convenient and precise chiral method was developed and validated for measuring indoxacarb enantiomers in green tea. The developed method was based on high-performance liquid chromatography coupled with tandem mass spectrometry using a Chiralpak IC column. The stereoselective degradation of indoxacarb enantiomers showed that the (+)-S-enantiomer dissipated faster than the (-)-R-enantiomer in all three typical tea farms. However, no enantiomerization was observed after applying pure (+)-S-indoxacarb. Residues on tea plant of the active ingredient (+)-S-indoxacarb from suspension concentrate (SC) was more persistent than that from emulsifiable concentrate (EC).
authors: State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, P.R. China; Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang, P.R. China.
authors: Yuping
authors: Y
authors: Zhang
authors: Deyu
authors: D
authors: Hu
authors: Xingang
authors: X
authors: Meng
authors: Qingcai
authors: Q
authors: Shi
authors: Pei
authors: P
authors: Li
authors: Linhong
authors: L
authors: Jin
authors: Kankan
authors: K
authors: Zhang
authors: Baoan
authors: B
authors: Song
mesh_terms: D002626:Chemistry, Pharmaceutical; D002851:Chromatography, High Pressure Liquid; D010078:Oxazines / Q000737:chemistry*; D013237:Stereoisomerism; D053719:Tandem Mass Spectrometry; D013662:Tea / Q000737:chemistry*
chemical_list: D010078:Oxazines; D013662:Tea; C401104:indoxacarb
keywords: Chiralpak IC column; LC/MS/MS; enantioselective degradation; green tea; indoxacarb enantiomers