Liquid-phase microextraction – The different principles and configurations

Yamini, Yadollah; Rezazadeh, Maryam; Seidi, Shahram

doi:10.1016/j.trac.2018.06.010

Cited by 209 publications

(64 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Improvements in analytical extraction methods from a GAC perspective include the reduction of analysis times by using, for example, ultrasounds or microwaves to accelerate the extraction step, particularly when dealing with solid samples [73]. Regarding miniaturization, GAC approaches include the generic liquid-phase microextraction (when the extraction solvent amount rarely exceeds 0.5 mL) [74,75] and solid-based miniaturized extraction (when the extraction sorbent amount is below 0.5 g) [76][77][78] methods. Among sorbent-based miniaturized approaches, it is possible to distinguish many sub-modes.…”

Section: Mofs In Analytical Sample Preparationmentioning

confidence: 99%

Metal-Organic Frameworks in Green Analytical Chemistry

et al. 2019

View full text Add to dashboard Cite

Metal-organic frameworks (MOFs) are porous hybrid materials composed of metal ions and organic linkers, characterized by their crystallinity and by the highest known surface areas. MOFs structures present accessible cages, tunnels and modifiable pores, together with adequate mechanical and thermal stability. Their outstanding properties have led to their recognition as revolutionary materials in recent years. Analytical chemistry has also benefited from the potential of MOF applications. MOFs succeed as sorbent materials in extraction and microextraction procedures, as sensors, and as stationary or pseudo-stationary phases in chromatographic systems. To date, around 100 different MOFs form part of those analytical applications. This review intends to give an overview on the use of MOFs in analytical chemistry in recent years (2017–2019) within the framework of green analytical chemistry requirements, with a particular emphasis on possible toxicity issues of neat MOFs and trends to ensure green approaches in their preparation.

show abstract

Section: Mofs In Analytical Sample Preparationmentioning

confidence: 99%

Metal-Organic Frameworks in Green Analytical Chemistry

et al. 2019

View full text Add to dashboard Cite

show abstract

“…However, the application of sample pretreatment, including preconcentration techniques such as solid-phase extraction [ 18 , 19 , 20 , 21 ], solid-phase microextraction [ 22 , 23 ], and dispersive liquid–liquid microextraction [ 16 , 24 , 25 ], has led to significant improvements in analytical methods and enabled the accurate determination of the targeted pollutants. The microextraction-based preconcentration process is more promising than traditional extraction processes such as solid-phase extraction or liquid-phase extraction [ 26 , 27 ]. Solid-phase microextraction and liquid-phase microextraction were recently introduced, and have many advantages, such as fast operation, as well as requiring a lower amount of chemicals during their conduction [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…Solid-phase microextraction and liquid-phase microextraction were recently introduced, and have many advantages, such as fast operation, as well as requiring a lower amount of chemicals during their conduction [ 28 ]. However, the liquid-phase microextraction process is superior to solid-phase microextraction due to its simple and quick phase separation as well as its ability to apply a direct injection of the separated phase for instrumental analysis [ 27 , 29 ]. The development of the microextraction steps to preconcentrate Pb(II) has been reported; for example, Zhou et al [ 24 ] applied dithizone to chelate Pb(II) for dispersive liquid liquid microextraction (DLLME) application with a precision of 2.12% (RSD, n = 7) and a detection limit of 0.95 ng L −1 .…”

Section: Introductionmentioning

confidence: 99%

Deep Eutectic Solvent-Based Microextraction of Lead(II) Traces from Water and Aqueous Extracts before FAAS Measurements

et al. 2020

View full text Add to dashboard Cite

Microextraction procedures for the separation of Pb(II) from water and food samples extracts were developed. A deep eutectic solvent composed of α-benzoin oxime and iron(III) chloride dissolved in phenol was applied as a phase separator support. In addition, this deep eutectic mixture worked as an efficient extractor of Pb(II). The developed microextraction process showed a high ability to tolerate the common coexisting ions in the real samples. The optimum conditions for quantitative recoveries of Pb(II) from aqueous extracts were at pH 2.0, conducted by adding 150 µL from the deep eutectic solvent. The quantitative recoveries were obtained with various initial sample volumes up to 30 mL. Limits of detection and limits of quantification of 0.008 and 0.025 µg L−1 were achieved with a relative standard deviation (RSD%) of 2.9, which indicates the accuracy and sensitivity of the developed procedure. Recoveries from the reference materials, including TMDA 64.2, TMDA 53.3, and NCSDC-73349, were 100%, 97%, and 102%, respectively. Real samples, such as tap, lake, and river water, as well as food samples, including salted peanuts, chickpeas, roasted yellow corn, pistachios, and almonds, were successfully applied for Pb(II) analysis by atomic absorption spectroscopy (AAS) after applying the developed deep eutectic solvent-based microextraction procedures.

show abstract

“…Selectivity and sensitivity of most analytical determination can be considerably decreased in such scenarios, especially in routine chromatographic or capillary electrophoresis methods. To overcome those limitations, sample pretreatment steps to isolate and preconcentrate analytes of interest have been implemented in analytical procedures [4].…”

Section: Introductionmentioning

confidence: 99%

Application of Switchable Hydrophobicity Solvents for Extraction of Emerging Contaminants in Wastewater Samples

et al. 2019

View full text Add to dashboard Cite

In the present work, the effectiveness of switchable hydrophobicity solvents (SHSs) as extraction solvent (N,N-Dimethylcyclohexylamine (DMCA), N,N-Diethylethanamine (TEA), and N,N-Benzyldimethylamine (DMBA)) for a variety of emerging pollutants was evaluated. Different pharmaceutical products (nonsteroidal anti-inflammatory drugs (NSAIDs), hormones, and triclosan) were selected as target analytes, covering a range of hydrophobicity (LogP) of 3.1 to 5.2. The optimized procedure was used for the determination of the target pharmaceutical analytes in wastewater samples as model analytical problem. Absolute extraction recoveries were in the range of 51% to 103%. The presented method permits the determination of the target analytes at the low ng mL−1 level, ranging from 0.8 to 5.9 (except for Triclosan, 106 ng mL−1) with good precision (relative standard deviation lower than 6%) using high-pressure liquid chromatography (HPLC) combined with ultraviolet (DAD) and fluorescence (FLR) detection. The microextraction alternative resulted in a fast, simple, and green method for a wide variety of analytes in environmental water sample. The results suggest that this type of solvent turns out to be a great alternative for the determination of different analytes in relatively complex water samples.

show abstract

Liquid-phase microextraction – The different principles and configurations

Cited by 209 publications

References 64 publications

Metal-Organic Frameworks in Green Analytical Chemistry

Metal-Organic Frameworks in Green Analytical Chemistry

Deep Eutectic Solvent-Based Microextraction of Lead(II) Traces from Water and Aqueous Extracts before FAAS Measurements

Application of Switchable Hydrophobicity Solvents for Extraction of Emerging Contaminants in Wastewater Samples

Contact Info

Product

Resources

About