2013•Journal of Fujian Agriculture and Forestry UniversityRequires access
Determination of 21 sorts of pesticide residues in fruits and vegetables by QuEChERS-HPLC-MS/MS
Dunming Xu
Open publisher page 1 citations
Abstract
An effective multi-residual method for the trace determination of 21 sorts of pesticide residues in fruits and vegetables was developed by HPLC-MS/MS.Target pesticides in samples were extracted by acetonitrile,purified by developed QuEChERS method,then analyzed using HPLC-MS/MS under multiple reaction monitoring(MRM) mode with positive electrospray ionization,and Agilent Extend-C18 column(2.1×100 mm,3.5 μm) was used as the analytical column.The results showed the 21 pesticides were linear in the range of 0.005-0.500 mg·L-1 with R20.9956.The limits of detection(LODs) and the limits of quantification(LOQs) of Sulfentrazone and Clodinafop acid both were 4 μg·kg-1,12 μg·kg-1,respectively,the others all were 2 μg·kg-1,5 μg·kg-1,respectively.The recoveries ranged from 67.7% to 105.1%,with the relative standard deviations(RSDs,n=6) of 2.8%-13.2%.