title: Pyraflufen-ethyl residues in soil by solid phase extraction and high-performance liquid chromatography with UV detection.
abstract: Solid-phase extraction (SPE) procedure for cleanup followed by HPLC-UV method has been investigated for the determination of pyraflufen-ethyl residues in soil. The pesticide is extracted from the sample with acetone-water (80:20, v/v) and the extract is loaded onto an octadecyl (C(18)) column. The pesticide is eluted with acetonitrile and determined by HPLC with a UV detector. Using an acetone-water extraction followed by a C(18) cleanup, this method is characterized by recovery >90.1%, precision <5.8% RSD and sensitivity of 0.01 mg/kg. The proposed method has been successfully employed for the determination of the degradation dynamics of pyraflufen-ethyl in four agricultural soil samples under laboratory conditions.
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
authors.forename: Hui-Li
authors.initials: HL
authors.lastname: Wang
authors.forename: Jian-Zhong
authors.initials: JZ
authors.lastname: Li
authors.forename: Ji-Ye
authors.initials: JY
authors.lastname: Hu