Recent trends in replacement of disperser solvent in dispersive liquid-liquid microextraction methods

Sereshti, Hassan; Khorram, Parisa; Nouri, Nayereh

doi:10.1080/15422119.2018.1460851

Cited by 57 publications

(22 citation statements)

References 109 publications

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“…The volume of extraction solvent has a significant impact on the preconcentration factor in the DLLME step. The optimum volume should ensure high enrichment factors and also provide enough collected volume for the analysis after centrifugation . Therefore, five different volumes of DES (135, 140, 145, 150, and 200 μL) were investigated.…”

Section: Resultsmentioning

confidence: 99%

“…Besides, unlike conventional SPE, in which the preconcentration is carried out by evaporation of the eluate, in the developed method preconcentration and elimination of potential matrix interferences are accomplished by the DLLME step. The evaporation process is time‐consuming and may have a detrimental effect on sample analytes …”

Section: Resultsmentioning

confidence: 99%

“…The use of green extraction solvents such as DESs makes the method more environmentally friendly. DESs are green solvents with attractive properties, including low cost, thermal and electrochemical stability, nontoxicity, high purity, and no chemical reactivity with water, and have attracted attention for many applications . They are synthesized by combining starting substances and heating them to about 80 °C.…”

Section: Introductionmentioning

confidence: 99%

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Hyphenated dispersive solid‐ and liquid‐phase microextraction technique based on a hydrophobic deep eutectic solvent: application for trace analysis of pesticides in fruit juices

et al. 2020

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BACKGROUND Pesticides are extensively used worldwide to control plant pathogens and prevent agricultural product damage. However, they can pollute the environment and endanger human health. So far, a variety of sample preparation methods have been developed for the analysis of pesticide residues. RESULTS A hyphenated solid–liquid microextraction method based on a new adsorbent of magnetic graphene oxide functionalized by (3‐glycidyloxypropyl)trimethoxysilane and a deep eutectic solvent (choline chloride/4‐chlorophenol (1:2)) was developed for extraction/preconcentration of trace levels of pesticides. The sorbent was characterized using scanning electron microscopy, Fourier transform infrared spectroscopy, and vibrating sample magnetometry. In‐syringe magnetic dispersive solid‐phase extraction in tandem with dispersive liquid–liquid microextraction followed by gas chromatography was applied for the analysis of the selected pesticides. The main parameters governing sample preparation efficiency, including adsorbent dosage, desorption conditions, pH, extraction time, deep eutectic solvent volume, and salt concentration, were investigated. The linear ranges were 0.024–500 μg L−1 with 0.9971–0.9999 linearity factor (R2). The limits of detection and quantification were 0.006–0.038 and 0.024–0.126 μg L−1, respectively. The relative standard deviations were 0.5–4.2% for intra‐day analysis and 2.7–4.6% for inter‐day analysis. Enrichment factors were in the range 210–540. CONCLUSIONS The method was successfully applied for the determination of malathion, heptachlor epoxide, endrin, dichlorodiphenyltrichloroethane, azinphos ethyl, cypermethrin, and deltamethrin in fruit juice samples (apple, pineapple, cherry, peach, and red and green grape juices) and the recoveries were within the range 71–115%. © 2020 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hyphenated dispersive solid‐ and liquid‐phase microextraction technique based on a hydrophobic deep eutectic solvent: application for trace analysis of pesticides in fruit juices

et al. 2020

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“…In the DLLME procedure, a binary solvent system (disperser and extraction solvents) should be rapidly injected in the aqueous phase to form a cloudy solution in which the extraction solvent is dispersed as very tiny droplets . Thus, the selection of an extraction solvent is a very important task.…”

Section: Resultsmentioning

confidence: 99%

Integrated in‐syringe magnetic sheet solid‐phase extraction and dispersive liquid–liquid microextraction for determination of aflatoxins in fresh and moldy breads

2019

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BACKGROUND: Magnetic three-dimensional graphene-based nanoadsorbents have unique characteristics such as large surface area, good thermal and chemical stability, and high adsorption capacity that make them efficient materials in sorbent-based extraction techniques. In this study, four aflatoxins (AFs) were analyzed in bread samples using magnetic three-dimensional graphene as the adsorbent phase in dispersive micro solid-phase extraction. RESULTS AND CONCLUSIONS: In-syringe magnetic sheet solid-phase extraction based on magnetic three-dimensional graphene in tandem with dispersive liquid-liquid microextraction was used for the extraction and preconcentration of the target AFs.The effect of significant parameters of the method was investigated and the optimum conditions were determined as follows: adsorbent dosage, 20 mg; desorption/disperser solvent (methanol) volume, 700 L; desorption solvent flow rate, 0.7 mL min −1 ; pH, neutral; salt (NaCl) concentration, 10% (w/v); extraction solvent (chloroform) volume, 250 L; and centrifugation rate (and time), 4000 rpm (5 min). The limits of detection and quantification were in the ranges 0.043-0.083 and 0.14-0.28 g kg −1 , respectively. The extraction method was followed by the HPLC technique with fluorescence detection and applied to the determination of the AFs in four different Iranian fresh and moldy bread samples. The relative recoveries were in the range 84-107% with relative standard deviations of 3.9-8.6%.

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“…For instance, one dispersion technique is temperature-controlled dispersive liquid-phase microextraction (TC-DLPME) [12], which can only be applied when the solubility of the extraction solvent is a function of temperature: a change in temperature greatly changes the solubility of the solvent, which mixes completely with the aqueous solution of the sample [13,14]. Another dispersion technique is ultrasound dispersive liquid-liquid micro extraction (US-DLLME), which uses ultrasound energy to develop the emulsion process of the extraction solvent in the sample solution without any dispersive solvent [15,16]. To facilitate the dispersion of the extraction solvent, it is also possible to use the surfactant assistant dispersive liquid-liquid micro extraction (SA-DLLME) where the dispersive solvent is replaced by a surfactant which, by reducing the surface tension of the extraction solvent, allows for a greater and more stable contact surface with the analytes present in solution [17].…”

Section: Introductionmentioning

confidence: 99%

Analytical Scheme for Simultaneous Determination of Phthalates and Bisphenol A in Honey Samples Based on Dispersive Liquid–Liquid Microextraction Followed by GC-IT/MS. Effect of the Thermal Stress on PAE/BP-A Levels

Notardonato

Passarella

Ianiri

et al. 2020

MPs

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In this paper, an analytical protocol was developed for the simultaneous determination of phthalates (di-methyl phthalate DMP, di-ethyl phthalate DEP, di-isobutyl phthalate DiBP, di-n-butyl phthalate DBP, bis-(2-ethylhexyl) phthalate DEHP, di-n-octyl phthalate DNOP) and bisphenol A (BPA). The extraction technique used was the ultrasound vortex assisted dispersive liquid–liquid microextraction (UVA-DLLME). The method involves analyte extraction using 75 µL of benzene and subsequent analysis by gas chromatography combined with ion trap mass spectrometry (GC-IT/MS). The method is sensitive, reliable, and reproducible with a limit of detection (LOD) below 13 ng g−1 and limit of quantification (LOQ) below 22 ng g−1 and the intra- and inter-day errors below 7.2 and 9.3, respectively. The method developed and validated was applied to six honey samples (i.e., four single-use commercial ones and two home-made ones. Some phthalates were found in the samples at concentrations below the specific migration limits (SMLs). Furthermore, the commercial samples were subjected to two different thermal stresses (24 h and 48 h at 40 °C) for evidence of the release of plastic from the containers. An increase in the phthalate concentrations was observed, especially during the first phase of the shock, but the levels were still within the limits of the regulations.

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Recent trends in replacement of disperser solvent in dispersive liquid-liquid microextraction methods

Cited by 57 publications

References 109 publications

Hyphenated dispersive solid‐ and liquid‐phase microextraction technique based on a hydrophobic deep eutectic solvent: application for trace analysis of pesticides in fruit juices

Hyphenated dispersive solid‐ and liquid‐phase microextraction technique based on a hydrophobic deep eutectic solvent: application for trace analysis of pesticides in fruit juices

Integrated in‐syringe magnetic sheet solid‐phase extraction and dispersive liquid–liquid microextraction for determination of aflatoxins in fresh and moldy breads

Analytical Scheme for Simultaneous Determination of Phthalates and Bisphenol A in Honey Samples Based on Dispersive Liquid–Liquid Microextraction Followed by GC-IT/MS. Effect of the Thermal Stress on PAE/BP-A Levels

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