| dc.description.abstract | A vortex assisted magnetic ionic liquid based dispersive liquid–liquid microextraction (VA-MIL-DLLME)
approach was proposed using a tetrachloromanganate-based magnetic ionic liquid (MIL, as extraction solvent)
for the determination and extraction of metribuzin in some plant samples by UV–Vis spectrophotometer. The MIL
was prepared from a mixture of trihexyl(tetradecyl)phosphonium chloride [P6,6,6,14 + ][Cl����� ] and manganese(II)
chloride tetrahydrate (MnCl2⋅4H2O) in chloroform. Important factors for the VA-MIL-DLLME approach were
optimized in detailed. The optimum conditions were: 8.0 of pH, 80 mg of the [P6,6,6,14 + ]2[MnCl4 2
����� ] (extraction
solvent), 250 μL of ethanol (as dispersing solvent), 3 min of vortex time and 1.5 mL of 30 % NaCl (w/v) (ionic
strength). Calibration graph was linear in the range of 35–800 μg L����� 1 with correlation of determination 0.995.
The limit of detection, limit of quantification and enrichment factor were found to be 10.6 μg L����� 1, 35 μg L����� 1 and
247, respectively. The VA-MIL-DLLME approach was applied for extraction and determination of metribuzin in
the samples. The relative standard deviations (RSD) in the samples were less than 2.8 %. Moreover, the recoveries
were obtained in the range of 91 ± 2–102 ± 3 %. | tr |
