Mercury species determination by task specific ionic liquid-based ultrasound-assisted dispersive liquid–liquid microextraction combined with cold vapour generation atomic absorption spectrometry

Stanisz, Ewa; Werner, Justyna; Matusiewicz, Henryk

doi:10.1016/j.microc.2013.01.006

Cited by 87 publications

(31 citation statements)

References 42 publications

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“…Since KBH 4 was employed as reductant, its appropriate concentration was optimized to avoid the side effects of the reaction in the closed CV system. The influence of KBH 4 were applied as extraction solvent, to investigate the effect of ZnO NPs composition on the extraction method. As can be seen in Fig.…”

Section: Study Of the Chemical Vapor Generationmentioning

confidence: 99%

“…The extraction of Hg 2 þ with ZnO-NF VA-LLME involves prior complexation of the analyte for efficient extraction [32,33] and the complex formation is dependent on the pH of the sample solution [4]. In this study, the possible pH effect on the complex formation and extraction of Hg 2 þ was investigated in the pH range of 2-10.…”

Section: Effect Of Ph Of the Sample Solutionmentioning

confidence: 99%

“…The field of microextraction has gained wide attention from green analytical chemistry (GAC) perspective due to limited consumption of the extraction solvent (o100 mL) [2]. There are various microextraction approaches like dispersive liquid liquid microextraction (DLLME) [4][5][6][7], solid phase (micro)extraction [8][9][10][11][12], single drop microextraction [13] and hollow fiber supported liquid phase microextraction [14] which have been investigated for the isolation and enrichment of trace analytes from the complex samples prior to detection. DLLME is cheap, simple and fast microextraction technique which presents high enrichment factor [15], even though difficulty to automation and the use of environmentally unfriendly solvents have been narrated as its limitations.…”

Section: Introductionmentioning

confidence: 99%

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Ionic liquid-based zinc oxide nanofluid for vortex assisted liquid liquid microextraction of inorganic mercury in environmental waters prior to cold vapor atomic fluorescence spectroscopic detection

Amde

Liu

Tan

et al. 2016

Talanta

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a b s t r a c tZinc oxide nanofluid (ZnO-NF) based vortex assisted liquid liquid microextraction (ZnO-NF VA-LLME) was developed and employed in extraction of inorganic mercury (Hg 2 þ ) in environmental water samples, followed by cold vapor atomic fluorescence spectrometry (CV-AFS). Unlike other dispersive liquid liquid microextraction techniques, ZnO-NF VA-LLME is free of volatile organic solvents and dispersive solvent consumption. Analytical signals were obtained without back-extraction from the ZnO-NF phase prior to CV-AFS determination. Some essential parameters of the ZnO-NF VA-LLME and cold vapor generation such as composition and volume of the nanofluid, vortexing time, pH of the sample solution, amount of the chelating agent, ionic strength and matrix interferences have been studied. Under optimal conditions, efficient extraction of 1 ng/mL of Hg 2 þ in 10 mL of sample solution was achieved using 50 μL of ZnO-NF. The enrichment factor before dilution, detection limits and limits of quantification of the method were about 190, 0.019 and 0.064 ng/mL, respectively. The intra and inter days relative standard deviations (n¼8) were found to be 4.6% and 7.8%, respectively, at 1 ng/mL spiking level. The accuracy of the current method was also evaluated by the analysis of certified reference materials, and the measured Hg 2 þ concentration of GBW08603 (9.6 ng/mL) and GBW(E)080392 (8.9 ng/mL) agreed well with their certified value (10 ng/mL). The method was applied to the analysis of Hg 2 þ in effluent, influent, lake and river water samples, with recoveries in the range of 79.8-92.8% and 83.6-106.1% at 1 ng/mL and 5 ng/mL spiking levels, respectively. Overall, ZnO-NF VA-LLME is fast, simple, cost-effective and environmentally friendly and it can be employed for efficient enrichment of the analyte from various water samples.

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Section: Study Of the Chemical Vapor Generationmentioning

confidence: 99%

Section: Effect Of Ph Of the Sample Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ionic liquid-based zinc oxide nanofluid for vortex assisted liquid liquid microextraction of inorganic mercury in environmental waters prior to cold vapor atomic fluorescence spectroscopic detection

Amde

Liu

Tan

et al. 2016

Talanta

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“…Different LPME techniques including single-drop microextraction [25,26], DLLME [27][28][29], in-situ IL-DLLME [23] and task-specific IL ultrasound-assisted DLLME [30] have been employed for the determination and speciation of mercury in water samples. In these works, bulky and expensive chromatographic systems [25,28,29], capillary electrophoresis [27], UV-Vis spectrometry [23], cold vapor [30] and electrothermal vaporization atomic absorption spectrometry [26] were used as separation and detection techniques, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…In these works, bulky and expensive chromatographic systems [25,28,29], capillary electrophoresis [27], UV-Vis spectrometry [23], cold vapor [30] and electrothermal vaporization atomic absorption spectrometry [26] were used as separation and detection techniques, respectively.…”

Section: Introductionmentioning

confidence: 99%

Screen-printed electrode based electrochemical detector coupled with ionic liquid dispersive liquid–liquid microextraction and microvolume back-extraction for determination of mercury in water samples

Fernández

Vidal

Martín‐Yerga

et al. 2015

Talanta

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Canals, Agustín Costa-García, Screen-printed electrode based electrochemical detector coupled with Ionic liquid dispersive liquid-liquid microextraction and microvolume back-extraction for determination of Mercury in water samples, Talanta, http://dx.doi.org/10. 1016/j.talanta.2014.11.069 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractA novel approach is presented, whereby gold nanostructured screenprinted carbon electrodes (SPCnAuEs) are combined with in-situ ionic liquid formation dispersive liquid-liquid microextraction (in-situ IL-DLLME) and microvolume back-extraction for the determination of mercury in water samples.In-situ IL-DLLME is based on a simple metathesis reaction between a watermiscible IL and a salt to form a water-immiscible IL into sample solution.Mercury complex with ammonium pyrrolidinedithiocarbamate is extracted from sample solution into the water-immiscible IL formed in-situ. Then, an ultrasound-assisted procedure is employed to back-extract the mercury into 10 µL of a 4 M HCl aqueous solution, which is finally analyzed using SPCnAuEs. ) and a coefficient of variation of 13% was obtained in both cases. The performance of the proposed methodology was evaluated in real-world water samples including tap water, bottled water, river water and industrial wastewater. Relative recoveries between 95 and 108% were obtained.

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Ionic‐liquid‐based surfactant‐emulsified microextraction procedure accelerated by ultrasound radiation followed by high‐performance liquid chromatography for the simultaneous determination of antidepressant and antipsychotic drugs

Zare

Ghaedi

Daneshfar

2015

J of Separation Science

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In the present work, an efficient and environmental friendly method of ionic-liquid-based emulsified microextraction procedure accelerated by ultrasound radiation has been developed. Subsequently, its performance was compared with dispersive liquid-liquid microextraction and ultrasound-assisted surfactant-based emulsification microextraction methods. The optimization of experimental conditions was carried out by combination of central composite design and response surface methodology. The optimum conditions of variables were set as follows: 50 μL of 1-hexyl-3-methylimidazolium hexafluorophosphate (extracting solvent), 10 min ultrasound time, and 10 min vortex time for agitating 6 mL sample solution in pH 3 in the presence of 4 mg sodium dodecyl sulfate without addition of salt and 200 μL of methanol as diluent solvent. Under these conditions, the responses are linear for doxepin and perphenazine in the range of 0.3-1000 and 5-1000 μg/L, respectively. The limits of detection were 0.1 μg/L for doxepin and 1 μg/L for perphenazine. Relative standard deviations were lower than 3.5 for the determination of both species. Finally, the method was used for the preconcentration and determination of doxepin and perphenazine in urine sample with relative recoveries in the range of 89-98%.

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Mercury species determination by task specific ionic liquid-based ultrasound-assisted dispersive liquid–liquid microextraction combined with cold vapour generation atomic absorption spectrometry

Cited by 87 publications

References 42 publications

Ionic liquid-based zinc oxide nanofluid for vortex assisted liquid liquid microextraction of inorganic mercury in environmental waters prior to cold vapor atomic fluorescence spectroscopic detection

Ionic liquid-based zinc oxide nanofluid for vortex assisted liquid liquid microextraction of inorganic mercury in environmental waters prior to cold vapor atomic fluorescence spectroscopic detection

Screen-printed electrode based electrochemical detector coupled with ionic liquid dispersive liquid–liquid microextraction and microvolume back-extraction for determination of mercury in water samples

Ionic‐liquid‐based surfactant‐emulsified microextraction procedure accelerated by ultrasound radiation followed by high‐performance liquid chromatography for the simultaneous determination of antidepressant and antipsychotic drugs

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