Simultaneous determination of pyrethrins residues in teas by ultra-performance liquid chromatography/tandem mass spectrometry

摘要: Abstract A sensitive and effective method for the simultaneous quantitative determination of pyrethrin residues in teas was developed validated using ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC–MS/MS). The six major constituents pyrethrins (pyrethrin I II, jasmolin cinerin II) were successfully separated independently confirmed a single run within approximately 5 min. multi-residue analysis involved simply extraction acetonitrile, clean-up multilayer solid phase cartridge, subsequent separation by hydrophilic end-capped Aquasil C18 columns detection an electrospray ionization source positive mode (ESI+). Recovery studies carried out at three spiked levels (0.05, 0.1, 0.5 mg kg−1). overall average recoveries this green black concentration ranged from 76.15% to 101.86% relative standard deviations (RSDs) range 2.71–12.93% (n = 5) all analytes. limits detections (LODs) below 0.009 mg kg−1, which lower than maximum residue (MRLs) 0.5 mg kg−1 tea samples established European Union legislations 2008, while quantification (LOQ) did not exceed 0.03 mg kg−1. This study provides theoretical basis China draw up MRLs teas.