Determination Of Residual Cumyluron In Vegetable By Solid Phase Extraction With Gas Chromatography/Mass Spectrometry And Its Fragmentation Mechanism Study

A method was developed for the determination of residual cumyluron in vegetable by gas chromatography/mass spectrometry (GC/MS). The sample was extracted with acetonitrile, separated with liquid-liquid partition and purified by solid phase extraction (SPE). After investigating the conditions of pretreatment and determination, the method was convenient and rapid. Under the optimal conditions, the detection limits of cumyluron was 0.008 mg/kg,the recoveries for adding level in the ranges of 0.01-0.5 mg/kg were 98% - 122% the relative standard deviations were 6.9% - 14.2%. The fragmentation mechanism of cumyluron was also studied.