Simultaneous determination of selected herbicides in dam lake, river and well water samples by gas chromatography mass spectrometry after vortex assisted binary solvent liquid phase microextraction

摘要: Abstract A sensitive and accurate binary solvent-liquid phase microextraction (BS-LPME) method was developed for the determination of alachlor, nitrofen bifenox as herbicides in environmental water matrices at trace levels by gas chromatography mass spectrometry (GC–MS). The solvent system used to improve extraction efficiencies all analytes comparison single solvents. comprehensive univariate optimization performed determine optimum experimental conditions based on type amount dispersive solvents, mixing period. parameters obtained were (100 μL dichloromethane + 100 μL 1,2-dichloroethane), 2.5 mL ethanol 15 s vortex. Under conditions, satisfactory analytical figures merit calculated analytes. limits detection (LODs) 0.30, 0.60 2.0 ng mL−1, respectively. Spiked recovery experiments carried out dam lake, river well samples percent recoveries fell within range 83–121%.