A GC/ECD method was developed and validated for the simultaneous analysis of clofentezine,bromopropylate,chlorfenapyr,and pyridaben residues in apple and citrus.The apple and citrus samples were extracted with acetonitrile,and purified by QuEChERS method using C18 and MgSO4 as adsorbents,then determined by GC/ECD and quantified by the matrix-matched standards solution.The result showed that the calibration curves were linear in the ranges of 0.02-2.0 mg/L for clofentezine and pyridaben,and 0.004-0.5 mg/L for bromopropylate and chlorfenapyr,with correlation coefficients more than 0.99.The limits of quantitation(LOQs) for four acaricides were between 0.001 mg/kg and 0.02 mg/kg.The average recoveries(n=6) of the four analytes in apple and citrus at three spiked levels were between 76.4% and 111.8% with RSDs not more than 13.4%.This method is simple,rapid,effective and safe,and could meet the requirements for the simultaneous-determination of clofentezine,bromopropylate,chlorfenapyr and pyridaben residues in apple and citrus samples.
Residue Analysis of Thiamethoxam,Chlorfenapyr and Lambda-cyhalothrin in Tea and Soil by GC/ECD after QuEChERS Clean-up
Rapid Determination of Lufenuron Residue in Apple and Soil by Ultra Performance Liquid Chromatography
Residue Determination of Niclosamide-olamine in Twenty Two Kinds of Agricultural Products by UPLC-MS/MS
Simultaneous Determination of 16 Coumarins and Vanillins and Their Derivatives in Rice by QuEChERS-Isotope Internal Standard/Ultra-high Performance Liquid Chromatography-Tandem Mass Spectrometry
Screening of 166 Pesticide Residues in Tea Based on Ultra High Performance Liquid Chromatography-Quadrupole/Electrostatic Field Orbitrap High Resolution Mass Spectrometry
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