摘要：We evaluated a simultaneous analytical method for organophosphorous pesticides in foods using dual-column gas chromatography (GC) with a mass spectrometer (MS) and pulsed flame photometric detector (PFPD, P mode). The pesticides were extracted with ethyl acetate in the presence of anhydrous Na2SO4 using a homogenizer. The extract was concentrated and reconstituted in acetonitrile, followed by clean-up with a tandem C18 column and double-layered SPE cartridge column (graphite carbon black/aminopropyl). The test solution, divided into two vials, was measured simultaneously with two automatic liquid samplers. Mass spectra and selective detection of PFPD were obtained from the results of a single measurement. By comparing the data from various types of detectors, it is possible to obtain more qualitative information. This method was useful for the analysis of organophosphorous pesticides in foods.
