Ionic liquid ultrasound-assisted dispersive liquid-liquid microextraction based on solidification of the aqueous phase for preconcentration of heavy metals ions prior to determination by LC-UV

Werner, Justyna

doi:10.1016/j.talanta.2018.01.060

Cited by 50 publications

(11 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Werner [71] analyzed Ni 2+ , Co 2+ , Cd 2+ , Cu 2+ , and Pb 2+ using Cyphos IL 104 in river and lake water with ionic liquid ultrasound-assisted dispersive liquid-liquid microextraction based on solidification of the aqueous phase method (IL-UA-DLLME-SAP). Under pH = 5.0, the RSDs and recoveries were in the range of 2.0–6.0% and 97.0–102.0%, respectively.…”

Section: Applications Of Ionic Liquids As Solventsmentioning

confidence: 99%

Determination of Heavy Metal Ions and Organic Pollutants in Water Samples Using Ionic Liquids and Ionic Liquid-Modified Sorbents

Tian

Fang

Yan

et al. 2019

Journal of Analytical Methods in Chemistry

View full text Add to dashboard Cite

Water pollution, especially by inorganic and organic substances, is considered as a critical problem worldwide. Several governmental agencies are listing an increasing number of compounds as serious problems in water because of their toxicity, bioaccumulation, and persistence. In recent decades, there has been considerable research on developing analytical methods of heavy metal ions and organic pollutants from water. Ionic liquids, as the environment-friendly solvents, have been applied in the analytical process owing to their unique physicochemical properties. This review summarizes the applications of ionic liquids in the determination of heavy metal ions and organic pollutants in water samples. In addition, some sorbents that were modified physically or chemically by ionic liquids were applied in the adsorption of pollutants. According to the results in all references, the application of new designed ionic liquids and related sorbents is expected to increase in the future

show abstract

Section: Applications Of Ionic Liquids As Solventsmentioning

confidence: 99%

Determination of Heavy Metal Ions and Organic Pollutants in Water Samples Using Ionic Liquids and Ionic Liquid-Modified Sorbents

Tian

Fang

Yan

et al. 2019

Journal of Analytical Methods in Chemistry

View full text Add to dashboard Cite

show abstract

“…Another innovation in the DLLME technique was the introduction of the solidification of a floating organic drop (DLLME-SFO), which is possible in the case of extractants lighter than water, with a freezing point lower than room temperature [30][31][32]. However, the introduction of solidification of the aqueous phase (DLLME-SAP) may be an interesting solution especially for extractants lighter than water, with a freezing point much lower than the freezing point of water [33,34].…”

Section: Introductionmentioning

confidence: 99%

Ligandless, deep eutectic solvent‐based ultrasound‐assisted dispersive liquid‐liquid microextraction with solidification of the aqueous phase for preconcentration of lead, cadmium, cobalt and nickel in water samples

Werner

2020

J of Separation Science

Self Cite

View full text Add to dashboard Cite

A green and efficient sample preparation method using a deep eutectic solvent-based ultrasounds-assisted dispersive liquid-liquid microextraction with solidification of the aqueous phase followed by high performance liquid chromatography analysis was developed for preconcentration and determination of heavy metals in environmental samples. In the proposed method, a novel, low density deep eutectic solvent was prepared by mixing trihexyl(tetradecyl)phosphonium chloride and thiosalicylic acid at a molar ratio of 1:2 and used both as an extractant and complexing agent. Ultrasound was used to disperse the extractant in the aqueous phase of the sample. Then, the phases were separated by centrifugation, after which the aqueous phase was frozen and the surface extractant phase was dissolved in a small volume of acetonitrile and subjected to liquid chromatographic analysis. The proposed method provided precisions (relative standard deviation, n = 5) in the range of 2.6-4.7%. The limit of detection were 0.05, 0.13, 0.06, and 0.11 μg/L for Pb(II), Cd(II), Co(II), Ni(II), respectively. The enhancement factors were equal to 154, 159, 162, and 158 for lead(II), cadmium(II), cobalt(II), and nickel(II), respectively. The accuracy of the proposed method was evaluated using certified reference materials (CA011b -hard drinking water, NIST 1643e -trace elements in water, TMRAIN-04 -simulated rain sample). K E Y W O R D Sdeep eutectic solvents, dispersive liquid-liquid microextraction, heavy metals, solidification of aqueous phase, ultrasound

show abstract

“…LPME includes diverse techniques characterized by small volumes of organic solvents . Three main modes of LPME are single drop microextraction , hollow fiber–liquid phase microextraction , and dispersive liquid–liquid microextraction (DLLME) . DLLME is an important sample preparation method which was firstly performed by Assadi and co–workers .…”

Section: Introductionmentioning

confidence: 99%

Deep eutectic solvent based homogeneous liquid–liquid extraction coupled with in‐syringe dispersive liquid–liquid microextraction performed in narrow tube; application in extraction and preconcentration of some herbicides from tea

Torbati

Farajzadeh

Mogaddam

et al. 2019

J of Separation Science

View full text Add to dashboard Cite

A homogeneous liquid‐liquid extraction performed in narrow tube coupled to in–syringe‐dispersive liquid‐liquid microextraction based on deep eutectic solvent has been developed for the extraction of six herbicides from tea samples. In this method, sodium chloride as a separation agent is filled into the narrow tube and the tea sample is placed on top of the salt. Then a mixture of deionized water and deep eutectic solvent (water miscible) is passed through the tube. In this procedure, the deep eutectic solvent is realized as tiny droplets in contact with salt. By passing the droplets from the tea layer placed on the salt layer, the analytes are extracted into them. After collecting the solvent as separated layer, it is mixed with another deep eutectic solvent (choline chloride/butyric acid) and the mixture is dispersed into deionized water placed in a syringe. After adding acetonitrile to break up the cloudy state, the collected organic phase is injected into gas chromatography‐mass spectrometry. Under optimal conditions, limits of detection and quantification in the ranges of 2.6–8.4 and 9.7–29 ng/kg, respectively, were obtained. The extraction recoveries and enrichment factors in the ranges of 70–89% and 350–445 were obtained, respectively.

show abstract

Ionic liquid ultrasound-assisted dispersive liquid-liquid microextraction based on solidification of the aqueous phase for preconcentration of heavy metals ions prior to determination by LC-UV

Cited by 50 publications

References 37 publications

Determination of Heavy Metal Ions and Organic Pollutants in Water Samples Using Ionic Liquids and Ionic Liquid-Modified Sorbents

Determination of Heavy Metal Ions and Organic Pollutants in Water Samples Using Ionic Liquids and Ionic Liquid-Modified Sorbents

Ligandless, deep eutectic solvent‐based ultrasound‐assisted dispersive liquid‐liquid microextraction with solidification of the aqueous phase for preconcentration of lead, cadmium, cobalt and nickel in water samples

Deep eutectic solvent based homogeneous liquid–liquid extraction coupled with in‐syringe dispersive liquid–liquid microextraction performed in narrow tube; application in extraction and preconcentration of some herbicides from tea

Contact Info

Product

Resources

About