Vortex-assisted liquid–liquid microextraction of octylphenol, nonylphenol and bisphenol-A

Yiantzi, Evangelia; Psillakis, Elefteria; Tyrovola, Konstantina; Kalogerakis, Nicolas

doi:10.1016/j.talanta.2009.11.005

Cited by 314 publications

(174 citation statements)

References 35 publications

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“…VA-CPE is a versatile procedure with attractive characteristics such as simplicity, inexpensive, rapidity, selectivity with high sensitivity enhancement and preconcentration factors when especially compared with solvent extraction and SPE, which needs to use toxic organic solvents for the separation and preconcentration of metal ions. Moreover, the use of a vortex device provides a large surface area between two phases, fast extraction kinetics, less solvent usage, fast and efficient analyte transfer as well as being simple, inexpensive and easy to operate according to other CPE procedures [25]. Also, VA-CPE as a preconcentration way was successfully used in analysis of arsenic, acrylamide, phenolic antioxidants and fluoroquinolones in different sample matrices by different detection techniques such as spectrophotometry, flame AAS, HPLC and spectrofluorometry, respectively [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…In this sense, the UV-Vis spectrophotometry is still widely used in analytical chemistry and successfully can be able to couple to cloud point extraction (CPE) in order to enhance the detection limit and selectivity of the method in trace analysis. Also, it is well known that the use of vortex device in CPE procedure provides large surface area between two phases, fast extraction kinetics, less solvent usage, fast and efficient analyte transfer as well as being simple, inexpensive and easy to operate according to other CPE procedures in the literature [25], in which the CPE with and without ultrasonic induction successfully is applied to determination of essential and toxic species such as sulfite [38], 5-hydroxymethylfurfural (5-HMF) [39] and cyanide [40] in the monitoring of foods and beverages safety and environmental pollution by our research group.…”

Section: Introductionmentioning

confidence: 99%

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Extraction, preconcentration and spectrophotometric determination of trace levels of thiosulfate in environmental waters

Gürkan

Altunay

Gürkan³

2017

J IRAN CHEM SOC

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are statistically in a good agreement with those obtained by DTNB method. Finally, the method developed was successfully applied to the preconcentration and determination of trace thiosulfate from environmental waters. Abstract In the existing study, a new vortex-assisted cloud point extraction (VA-CPE) method was developed for determination of low levels of thiosulfate in environmental waters at 632 nm by spectrophotometry. The method is selectively based on charge-transfer-sensitive ion-pair complex formation of Ag(S 2 O 3 ) 2 3− , which is produced by the reaction of thiosulfate with excess Ag + ions with toluidine blue (3-amino-7-dimethylamino-2-methylphenazathionium chloride, TB + ) and then its extraction into micellar phase of polyethylene glycol 4-tert-octylphenyl ether (Triton X-45) in presence of Na 2 SO 4 as salting-out agent at pH 7.0. All the factors affecting complex formation and VA-CPE efficiency were optimized in detail. Under the optimized conditions, the linear calibration curves for thiosulfate were in the range of 0.2-120 and 5-180 µg L −1 with sensitivity improvement of 81-folds and 15-folds, respectively, as a result of efficient mass transfer obtained by CPE with and without vortex, while it changed in the range of 260-3600 µg L −1 without preconcentration at 642 nm. The limits of detection and quantification of the method for VA-CPE were found to be 0.05 and 0.22 µg L −1 , respectively. The precision (expressed as the percent relative standard deviation) was in range of 2.5-4.8% (5, 10 and 25 µg L −1 , n: 5). The method accuracy was validated by comparing the results to those of an independent 5,5′-dithiobis(2-aminobenzoic acid) (DTNB) method as well as recovery studies from spiked samples. It has been observed that the results * Ramazan Gürkan Keywords

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extraction, preconcentration and spectrophotometric determination of trace levels of thiosulfate in environmental waters

Gürkan

Altunay

Gürkan³

2017

J IRAN CHEM SOC

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show abstract

“…Various approaches such as, ultrasound-assisted emulsification microextraction [7], ultrasoundassisted surfactant-enhanced microextraction [8], vortex-assisted liquid-liquid microextraction [9] and vortex-assisted surfactantenhanced emulsification liquid-liquid microextraction [10,11], were reported to overcome this disadvantage.…”

Section: Introductionmentioning

confidence: 99%

A fully automated effervescence assisted dispersive liquid–liquid microextraction based on a stepwise injection system. Determination of antipyrine in saliva samples

Medinskaia

Vakh

Aseeva

et al. 2016

Analytica Chimica Acta

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“…The immiscibility of some ILs with water and their negligible vapor pressure, as well as the high solubility of organic species in them, makes ILs suitable solvents for conventional liquid-liquid extraction. 12 Yiantzi et al 13 introduced a mild emulsification procedure as a new and fast microextraction method termed vortex-assisted liquid-liquid microextraction (VALLME) for the extraction of trace amounts of alkylphenols from water samples. In this method, extractant solvent is introduced to sample solution and the mixture is vigorously shaken with vortex agitator, so that fine droplet of extractant solvent can extract the analyte in short time.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration procedure using vortex agitator system for determination of trace levels of cadmium by flame atomic absorption spectrometry

Chamsaz¹,

Eftekhari²,

Atarodi³

et al. 2012

J. Braz. Chem. Soc.

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Um procedimento simples e rápido de microextração líquido-líquido com líquido iônico e agitação vortex (VALLME) foi usado na determinação de quantidades traço de cádmio por espectrometria de absorção atômica com chama (FAAS). O líquido iônico (IL), hexafluorato de 1-hexil-3-metilimidazólio ([Hmim][PF 6 ]), foi usado como solvente extractor. Os íons Cd 2+ foram complexados com pirrolidina ditiocarbamato de amônia (APDC), e então confinados em pequenas gotas de IL pela intervenção do sistema de agitação vortex. Alguns fatores que influenciam na extração tais como pH, concentração de ligante, quantidade de líquido iônico, tempo de extração e efeito da força iônica foram completamente investigados e otimizados. Sob condições ideais, o limite de detecção foi de 1,1 ng mL -1 . O desvio padrão relativo (RSD) foi 4,3% para 20 ng mL -1 de cádmio (n = 10), e o gráfico de calibração usando o método de preconcentração foi linear de 5 a 150 µg L -1 , com um coeficiente de correlação de 0,998. O método proposto foi aplicado com sucesso na determinação de cádmio em amostras de água e folhas de espinafre.A simple and rapid vortex-assisted ionic liquid based liquid-liquid microextraction (VALLME) procedure was used for the determination of trace amounts of cadmium by flame atomic absorption spectrometry (FAAS). Ionic liquid (IL), 1-hexyl-3-methylimidazolium hexafluorophosphate ([Hmim][PF 6 ]), was used as an extractant solvent. Cd 2+ was complexed with ammonium pyrrolidinedithiocarbamate (APDC) and then entered into the fine IL droplets by the assistance of vortex agitator system. Some effective factors that influence the extraction efficiency such as pH, ligand concentration, amount of ionic liquid, extraction time and ionic strength effect were completely investigated and optimized. Under the optimum conditions, the limit of detection (LOD) was 1.1 ng mL -1 . The relative standard deviation (RSD) was 4.3% for 20 ng mL -1 of cadmium (n = 10), and the calibration graph using the preconcentration method was linear from 5 to 150 µg L -1 , with a correlation coefficient of 0.998. The proposed method was successfully applied for determination of cadmium in water samples and spinach leaves.

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Vortex-assisted liquid–liquid microextraction of octylphenol, nonylphenol and bisphenol-A

Cited by 314 publications

References 35 publications

Extraction, preconcentration and spectrophotometric determination of trace levels of thiosulfate in environmental waters

Extraction, preconcentration and spectrophotometric determination of trace levels of thiosulfate in environmental waters

A fully automated effervescence assisted dispersive liquid–liquid microextraction based on a stepwise injection system. Determination of antipyrine in saliva samples

Preconcentration procedure using vortex agitator system for determination of trace levels of cadmium by flame atomic absorption spectrometry

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