Multiresidue determination of pesticides in drinking and related waters by gas chromatography/mass spectrometry after solid-phase extraction: Interlaboratory study (original) (raw)

This research investigates the multiresidue analysis of 22 pesticides in drinking and related waters using gas chromatography/mass spectrometry (GC/MS) following solid-phase extraction (SPE). An interlaboratory study involving 15 European labs assessed the method’s compliance with European Commission Directive 98/83 concerning accuracy, precision, and detection limits. Results indicated that while most pesticides met detection limits of 0.01 mg/L, some showed limitations in repeatability and reproducibility, particularly for compounds like trifluralin and dimethoate. The method demonstrated adequate accuracy for most pesticides but failed specific criteria for a few under certain matrix conditions, highlighting the challenges in regulatory compliance.