TY - JOUR

T1 - Dispersive Liquid–Liquid Microextraction of Pesticides Using Ionic Liquids As Extractants

AU - Bessonova, E. A.

AU - Deev, V. A.

AU - Kartsova, L. A.

N1 - Bessonova, E.A., Deev, V.A. & Kartsova, L.A. Dispersive Liquid–Liquid Microextraction of Pesticides Using Ionic Liquids As Extractants. J Anal Chem 75, 991–999 (2020). https://doi.org/10.1134/S1061934820080043

PY - 2020/8/1

Y1 - 2020/8/1

N2 - Abstract: It is found that ionic liquids (ILs) based on imidazole can be used as extractants in the dispersive liquid–liquid microextraction of combined pesticide preparations (imidacloprid, biphenthrin, cypermethrin, malathion, phosalone, and diazinon) followed by their determination by HPLC with electrospray ionization tandem mass spectrometry detection with. The effect of the IL (1-hexyl-3-methylimidazolium tetrafluoborate [C6MIM] [BF4], 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C6MIM] [NTf2], 1‑butyl-3-methylimidazolium hexafluorophosphate, [C4MIM] [PF]6) nature and of the dispersive solvent (acetonitrile, methanol, acetone) volume, extraction time, pH of sample solution, and salting-out agent on the efficiency of analyte extraction is studied. It is found that the maximum recoveries (86–99%) of pesticides were reached using acetonitrile as a dispersive solvent and the [C4MIM] [PF]6 ionic liquid as an extractant. The absence of the effect of pH on the distribution of analytes between the water and organic phases confirms the distributive extraction mechanism. The effect of the ionic liquid on the ionization of pesticides is estimated, and conditions of the back extraction of pesticides to hexane are proposed for its reduction.

AB - Abstract: It is found that ionic liquids (ILs) based on imidazole can be used as extractants in the dispersive liquid–liquid microextraction of combined pesticide preparations (imidacloprid, biphenthrin, cypermethrin, malathion, phosalone, and diazinon) followed by their determination by HPLC with electrospray ionization tandem mass spectrometry detection with. The effect of the IL (1-hexyl-3-methylimidazolium tetrafluoborate [C6MIM] [BF4], 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C6MIM] [NTf2], 1‑butyl-3-methylimidazolium hexafluorophosphate, [C4MIM] [PF]6) nature and of the dispersive solvent (acetonitrile, methanol, acetone) volume, extraction time, pH of sample solution, and salting-out agent on the efficiency of analyte extraction is studied. It is found that the maximum recoveries (86–99%) of pesticides were reached using acetonitrile as a dispersive solvent and the [C4MIM] [PF]6 ionic liquid as an extractant. The absence of the effect of pH on the distribution of analytes between the water and organic phases confirms the distributive extraction mechanism. The effect of the ionic liquid on the ionization of pesticides is estimated, and conditions of the back extraction of pesticides to hexane are proposed for its reduction.

KW - dispersive liquid–liquid microextractionn

KW - HPLC–MS/MS

KW - ionic liquids

KW - pesticides

KW - PRECONCENTRATION

KW - dispersive liquid-liquid microextractionn

KW - HPLC-MS

KW - MS

KW - ORGANOPHOSPHORUS PESTICIDES

KW - PERFORMANCE

KW - BENZODIAZEPINES

KW - CHROMATOGRAPHY

KW - PHASE MICROEXTRACTION

KW - SEPARATION

KW - INSECTICIDES

UR - http://www.scopus.com/inward/record.url?scp=85088779873&partnerID=8YFLogxK

U2 - 10.1134/S1061934820080043

DO - 10.1134/S1061934820080043

M3 - Article

AN - SCOPUS:85088779873

VL - 75

SP - 991

EP - 999

JO - Journal of Analytical Chemistry

JF - Journal of Analytical Chemistry

SN - 1061-9348

IS - 8

ER -