Simultaneous Determination of Triazine Herbicides in Maize by Gas ChromatographyMass Spectrometry

A multi-residue method for determination of 21 kinds of triazine herbicides in maize was described. The triazine herbicide residues were extracted with acetonitrile and cleaned up with strong cation-exchange solid-phase extraction column. The extraction was separated by capillary column (DB-5MS, 30 m×0.25 mm ×0.25 μm) and detected by GC/MS. The good linearities were obtained for 21 triazine herbicides. The limits of quantitation were 0.01mg/kg. The average spiked recoveries ranged from 84.0% to 104.1% and the relative standard deviations were between 0.8% and 5.1%.