In situ solvent formation microextraction based on ionic liquids: A novel sample preparation technique for determination of inorganic species in saline solutions

Baghdadi, Majid; Shemirani, Farzaneh

doi:10.1016/j.aca.2008.12.017

Cited by 196 publications

(84 citation statements)

References 60 publications

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“…ILs are melted salts at room temperature that possess unique properties among which we can highlight their high thermal and chemical stability with negligible vapour pressure, tuneable viscosity, electrolytic conductivity, wide electrochemical window and good extractability of organic compounds and metal ions [5]. The utilization of ILs has helped to overcome problems associated with LPME techniques using classical organic solvents [4], and enabled the development of new methods such as temperature-controlled IL dispersive liquid-liquid microextraction [6] and in situ IL formation dispersive liquid-liquid microextraction (in situ IL-DLLME) [7,8]. During in situ IL-DLLME the extractant phase is formed into sample solution via a metathesis reaction between a water-miscible IL and an ion exchange reagent to form a water-immiscible IL.…”

Section: Introductionmentioning

confidence: 99%

Tungsten coil atomic emission spectrometry combined with dispersive liquid–liquid microextraction: A synergistic association for chromium determination in water samples

Vidal

Silva

Canals

et al. 2016

Talanta

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A novel and environmentally friendly analytical method is reported for total chromium determination and chromium speciation in water samples, whereby tungsten coil atomic emission spectrometry (WCAES) is combined with in situ ionic liquid formation dispersive liquid-liquid microextraction (in situ IL-DLLME).A two stage multivariate optimization approach has been developed employing a Plackett-Burman design for screening and selection of the significant factor involved in the in situ IL-DLLME procedure, which was later optimized by means were 3 and 10 µg L -1 , respectively. This is a 233-fold improvement when 2 compared with chromium determination by WCAES without using preconcentration. The repeatability of the proposed method was evaluated at two different spiking levels (10 and 50 µg L -1 ) obtaining coefficients of variation of 11.4 and 3.6% (n=3), respectively. A certified reference material (SRM-1643e NIST) was analysed in order to determine the accuracy of the method for total chromium determination and 112.3% and 2.5 µg L -1 were the recovery (trueness) and standard deviation values, respectively. Tap, bottled mineral and natural mineral waters were analysed at 60 µg L -1 spiking level of total Cr content at two Cr(VI)/Cr(III) ratios, and relative recovery values were ranged between 88 and 112% showing that the matrix has a negligible effect. To our knowledge, this is the first time that combines in situ IL-DLLME and WCAES.

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Section: Introductionmentioning

confidence: 99%

Tungsten coil atomic emission spectrometry combined with dispersive liquid–liquid microextraction: A synergistic association for chromium determination in water samples

Vidal

Silva

Canals

et al. 2016

Talanta

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“…Baghdadi and Shemirani were the first to report this powerful sample preparation technique using the hydrophilic [C 6 MIM + ][BF 4 − ] IL and NaPF 6 as the anion-exchange agent for the extraction of Hg(II) in water samples [83]. Later that year, Yao et In addition, the guanidinium-based surfactant exhibited lower cytotoxicity than the imidazolium-based surfactant and therefore could provide a more environmentally benign alternative for use in analytical methods.…”

Section: In Situ Il-dllmementioning

confidence: 99%

Ionic liquids: solvents and sorbents in sample preparation

Clark

Emaus

Varona

et al. 2017

J of Separation Science

141

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The applications of ionic liquids (ILs) and IL-derived sorbents are rapidly expanding. By careful selection of the cation and anion components, the physicochemical properties of ILs can be altered to meet the requirements of specific applications. Reports of IL solvents possessing high selectivity for specific analytes are numerous and continue to motivate the development of new IL-based sample preparation methods that are faster, more selective, and environmentally benign compared to conventional organic solvents. The advantages of ILs have also been exploited in solid/polymer formats in which ordinarily nonspecific sorbents are functionalized with IL moieties in order to impart selectivity for an analyte or analyte class. Furthermore, new ILs that incorporate a paramagnetic component into the IL structure, known as magnetic ionic liquids (MILs), have emerged as useful solvents for bioanalytical applications. In this rapidly changing field, this Review focuses on the applications of ILs and IL-based sorbents in sample preparation with a special emphasis on liquid phase extraction techniques using ILs and MILs, IL-based solid-phase extraction, ILs in mass spectrometry, and biological applications. K E Y W O R D Salternative solvents, ionic liquids, magnetic ionic liquids, microextraction, sample preparation

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“…On the other hand, solubility of ILs is increased in aqueous solutions containing high ionic strength. 35,36 The effect of ionic strength on the sensitivity of the proposed method was investigated by the addition of sodium chloride in the range of 0.0-0.8 mol L −1 . The obtained results showed that the electrolyte had no considerable effects on the sensitivity of the method.…”

Section: Thirdmentioning

confidence: 99%

Ionic liquid based microextraction combined with derivatization for efficient enrichment/determination of asulam and sulfide

Eskandari¹,

SHAHBAZI-RAZ²

2016

Turk J Chem

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This study reports 2 new simple derivatization-based dispersive liquid-liquid microextraction (DLLME) methods for spectrophotometric ultratrace determination of asulam and sulfide. 1-Naphthol (in the presence of nitrite) and N,N-diethyl-p-phenylenediamine (in the presence of Fe(III)) were used to derivatize asulam and sulfide, respectively.In the enrichment methods, the formed derivatives were preconcentrated into microdroplets of the in situ formed water insoluble ionic liquid (IL), 1-hexyl-3-methylimidazolium hexafluorophosphate. Monitoring was performed at 526 nm for asulam and at 664 nm for sulfide, after dissolution of the IL-rich phases into the basic ethanolic solution and ethanol for asulam and sulfide, respectively. Beer's law was obeyed in the ranges of 1.0-80.0 and 0.1-5.0 ng mL −1 for asulam and sulfide, respectively. Limits of detection for asulam and sulfide determination by the DLLME methods were 0.18 and 0.019 ng mL −1 , respectively. Various foreign cations, anions, organics, and pesticides were tested to evaluate the selectivity of the DLLME methods. The methods were successfully applied to the determination of asulam and sulfide in various environmental, wastewater, and urine samples.

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In situ solvent formation microextraction based on ionic liquids: A novel sample preparation technique for determination of inorganic species in saline solutions

Cited by 196 publications

References 60 publications

Tungsten coil atomic emission spectrometry combined with dispersive liquid–liquid microextraction: A synergistic association for chromium determination in water samples

Tungsten coil atomic emission spectrometry combined with dispersive liquid–liquid microextraction: A synergistic association for chromium determination in water samples

Ionic liquids: solvents and sorbents in sample preparation

Ionic liquid based microextraction combined with derivatization for efficient enrichment/determination of asulam and sulfide

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