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Not AvailableA residue analysis method for the simultaneous estimation of 349 pesticides, 11 PCBs and 15 PAHs extracted from grape, pomegranate, okra, tomato and onion matrices, was established by using a gas chromatograph coupled to an electron impact ionization triple quadrupole mass spectrometer (GC–EI-MS/MS). The samples were extracted by ethyl acetate and cleaned by dispersive solid phase extraction with PSA and/or GCB/C18 by the methods reported earlier. The GC–EI-MS/MS parameters were optimized for analysis of all the 375 compounds within a 40 min run time with limit of quantification for most of the compounds at 0.99 within the calibration linearity range of <5–250 ng/mL for compounds with LOQs < 5 ng/mL. While for the compounds with LOQs within 5–10 μg/kg, the lowest calibration level was 5 and 10 μg/kg as applicable. The recoveries at 10, 25 and 50 ng/mL were within 70–110% (n = 6) with associated RSDs < 20% indicating satisfactory precision. The information generated from the single laboratory validation was further utilized for building a semi-quantitative approach. The accuracies in quantification obtained via individual calibration standards vis-à-vis semi-quantification approach were comparable. For incurred samples, the concentrations estimated by the semi-quantification approach were within ±10% of the values obtained by direct quantification. This approach complements the existing GC–EI-MS/MS methods by offering targeted screening and quantification capabilities.Not Availabl