A lighter-than-water deep eutectic-solvent-based dispersive liquid-phase microextraction method in a U-shaped homemade device

2018 ◽  
Vol 42 (12) ◽  
pp. 10100-10110 ◽  
Author(s):  
Abolghasem Jouyban ◽  
Mir Ali Farajzadeh ◽  
Mohammad Reza Afshar Mogaddam
Keyword(s):  
Liquid Phase ◽  
Fruit Juice ◽  
Deep Eutectic Solvent ◽  
Liquid Phase Microextraction ◽  
Vegetable Samples ◽  
Glass Filter

A new microextraction method, termed glass-filter-based dispersive liquid-phase microextraction using a lighter-than-water deep eutectic solvent, was developed for the extraction and preconcentration of different classes of pesticides from fruit juice and vegetable samples.

scholarly journals Novel hydrophobic deep eutectic solvent for vortex-assisted liquid phase microextraction of common acaricides in fruit juice followed by HPLC-UV determination

RSC Advances ◽  
2021 ◽  
Vol 11 (48) ◽  
pp. 30102-30108
Author(s):  
Setareh Rostami-Javanroudi ◽  
Masoud Moradi ◽  
Kiomars Sharafi ◽  
Nazir Fattahi
Keyword(s):  
Hydrogen Bond ◽  
Liquid Phase ◽  
Fruit Juice ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Straight Chain ◽  
Hydrogen Bond Acceptor ◽  
Liquid Phase Microextraction ◽  
Different Types ◽  
Hydrogen Bond Donors

In this research, several novel hydrophobic deep eutectic solvents (DESs) were prepared using methyltrioctylammonium chloride (MTOAC) as the hydrogen bond acceptor (HBA) and different types of straight chain alcohols as hydrogen bond donors (HBDs).

scholarly journals Supramolecular Solvent-Based Liquid Phase Microextraction Combined with Ion-Pairing Reversed-Phase HPLC for the Determination of Quats in Vegetable Samples

Toxics ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 60
Author(s):  
Sophon Hem ◽  
Netsirin Gissawong ◽  
Supalax Srijaranai ◽  
Suthasinee Boonchiangma
Keyword(s):  
Liquid Phase ◽  
Sodium Dodecyl ◽  
Tetrabutylammonium Bromide ◽  
Ion Pairing ◽  
Reversed Phase ◽  
Liquid Phase Microextraction ◽  
Vegetable Samples ◽  
Relative Standard ◽  
Supramolecular Solvent

In this study, we used anion supramolecular solvent (SUPRAS) prepared from a mixture of an anionic surfactant, sodium dodecyl sulfate (SDS), and a cationic surfactant, tetrabutylammonium bromide (TBABr), as the extraction solvent in liquid phase microextraction (LPME) of paraquat (PQ) and diquat (DQ). The enriched PQ and DQ in the SUPRAS phase were simultaneously analyzed by ion-pairing reversed-phase high performance liquid chromatography. PQ and DQ were successfully extracted by LPME via electrostatic interaction between the positive charge of the quats and the negative charge of SUPRAS. PQ, DQ, and ethyl viologen (the internal standard) were separated within 15 min on a C18 column, with the mobile phase containing 1-dodecanesulfonic acid and triethylamine, via UV detection. The optimized conditions for the extraction of 10 mL aqueous solution are 50 μL of SUPRAS prepared from a mixture of SDS and TBABr at a mole ratio of 1:0.5, vortexed for 10 s at 1800 rpm, and centrifugation for 1 min at 3500 rpm. The obtained enrichment factors were 22 and 26 with limits of detection of 1.5 and 2.8 µg L−1 for DQ and PQ, respectively. The precision was good with relative standard deviations less than 3.86%. The proposed method was successfully applied for the determination of PQ and DQ in vegetable samples and recoveries were found in the range of 75.0% to 106.7%.

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