Dispersive liquid‐liquid microextraction method combined with sugaring‐out homogeneous liquid‐liquid extraction for the determination of some pesticides in molasses samples

2021 ◽  
Author(s):  
Elif Yıldız ◽  
Hasan Çabuk
Keyword(s):  
Liquid Extraction ◽  
Homogeneous Liquid ◽  
Liquid Liquid Extraction ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Determination of neonicotinoid insecticide residues in edible oils by water-induced homogeneous liquid–liquid extraction and dispersive liquid–liquid extraction followed by high performance liquid chromatography-diode array detection

RSC Advances ◽  
2015 ◽  
Vol 5 (95) ◽  
pp. 77501-77507 ◽  
Author(s):  
Mir Ali Farajzadeh ◽  
Mohammad Reza Afshar Mogaddam ◽  
Ali Akbar Alizadeh
Keyword(s):  
High Performance ◽  
Edible Oils ◽  
Liquid Extraction ◽  
Homogeneous Liquid ◽  
Liquid Liquid Extraction ◽  
Neonicotinoid Insecticide ◽  
Array Detection ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Development of a new version of homogeneous liquid–liquid extraction based on water induced followed by dispersive liquid–liquid microextraction for extraction of neonicotinoid insecticides from oil samples.

Combination of Counter Current Salting-Out Homogenous Liquid–Liquid Extraction with Dispersive Liquid–Liquid Microextraction for the High-Performance Liquid Chromatographic Determination of Environmental Estrogens in Water Samples

2019 ◽  
Vol 58 (2) ◽  
pp. 171-177 ◽  
Author(s):  
Zhihong Shi ◽  
Qingru Huai ◽  
Xinye Li ◽  
Hongyu Ma ◽  
Can Zhou ◽  
...  
Keyword(s):  
Water Samples ◽  
High Performance ◽  
Liquid Extraction ◽  
Environmental Estrogens ◽  
Salting Out ◽  
Liquid Liquid Extraction ◽  
Dispersive Liquid Liquid Microextraction ◽  
Counter Current ◽  
Liquid Microextraction

Abstract In this paper, counter current salting-out homogenous liquid–liquid extraction was combined with dispersive liquid–liquid microextraction for the determination of environmental estrogens in water samples by high-performance liquid chromatography. In this method, initially, sodium chloride was filled into a syringe and a mixture of water sample and acetonitrile was driven to pass through the syringe. Due to salting-out effect, fine droplets of acetonitrile went up through the remaining mixture and aggregated as a separated layer on the top. Then, the collected organic phase (acetonitrile) was removed with a syringe and mixed with carbon tetrachloride (extraction solvent). In the second step, the mixed organic phase was rapidly injected into 5 mL of distilled water to further enrich the analytes. Good linearity was obtained in the concentration range of 2.0~200 ng/mL for diethylstilbestrol (DES) and 8.0~200 ng/mL for octylphenol (OP), respectively. Limits of detection were 0.09 ng/mL for DES and 0.20 ng/mL for OP, respectively. Relative standard deviations for intra- and inter-day precisions were less than 2.1 and 3.1%, respectively. Finally, the established method was successfully applied to determine DES and OP in river water, well water, bottled water and campus drinking water samples with recoveries in the range from 81.0 to 105.9%.

scholarly journals Determination of phenolic compounds in industrial wastewaters by gas chromatography after extraction and preconcentration by microextraction procedure

2020 ◽  
Keyword(s):  
Gas Chromatography ◽  
Phenolic Compounds ◽  
Enrichment Factors ◽  
Liquid Extraction ◽  
Fast Method ◽  
Effective Parameters ◽  
Homogeneous Liquid ◽  
Liquid Liquid Extraction ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

<p>This paper presents an efficient, simple, and fast method for the derivatization, extraction, and preconcentration of several phenolic compounds (phenol, o–, m– and p–cresol, 4–chlorophenol, and 2–nitrophenol) from wastewater samples and analysis of those samples by gas chromatography–flame ionization detection. In this method, initially the phenolic compounds are derivatized with acetic anhydride in an alkaline pH. In the following, the derivatized analytes are extracted into mL–volume of acetonitrile during homogeneous liquid–liquid extraction and further enrichment of the analytes are accomplished by their extraction into µL–volume of 1,1,2–trichloroethane through dispersive liquid–liquid microextraction step. Effective parameters controlling the performance of the proposed method such as type and volume of derivatization agent and catalyst, type and volume of extraction/disperser solvent in homogeneous liquid–liquid extraction, and type and volume of extraction solvent and salt addition in dispersive liquid–liquid microextraction are optimized. Under optimum conditions linear range of the proposed method was obtained 0.7–4000 µg L–1. Limits of detection and quantification were in the ranges of 0.07–0.20 and 0.23–0.70 µg L–1, respectively. Enrichment factors and extraction recoveries were ranged from 220 to 440 and 44 to 88%, respectively.</p>

Development of homogeneous liquid–liquid extraction combined with dispersive liquid–liquid microextraction based on solidification of floating droplets of a ternary component deep eutectic solvent for the analysis of antibiotic residues in sausage samples prior to ion mobility spectrometry

2020 ◽  
Vol 12 (34) ◽  
pp. 4220-4228
Author(s):  
Ali Saei ◽  
Afshin Javadi ◽  
Mohammad Reza Afshar Mogaddam ◽  
Hamid Mirzaei ◽  
Mahboob Nemati
Keyword(s):  
Ion Mobility ◽  
Deep Eutectic Solvent ◽  
Liquid Extraction ◽  
Penicillin G ◽  
Antibiotic Residues ◽  
Homogeneous Liquid ◽  
Liquid Liquid Extraction ◽  
Dispersive Liquid Liquid Microextraction ◽  
Ternary Component ◽  
Liquid Microextraction

A combination of homogeneous liquid–liquid extraction and dispersive liquid–liquid microextraction based on solidification of a deep eutectic solvent is used for the extraction of 3 widely used antibiotics (oxytetracycline, penicillin G and tilmicosin) from sausage samples.

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