Ionic liquid ultrasound assisted dispersive liquid–liquid microextraction method for preconcentration of trace amounts of rhodium prior to flame atomic absorption spectrometry determination

Molaakbari, Elaheh; Mostafavi, Ali; Afzali, Daryoush

doi:10.1016/j.jhazmat.2010.09.067

Cited by 81 publications

(35 citation statements)

References 45 publications

(46 reference statements)

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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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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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“…17 Interference of Cu 2+ and Zn 2+ were eliminated in the presence of 0.02 mol L -1 ethylenediaminetetraacetic acid disodium salt (EDTA). 18 …”

Section: Effect Of Co-existing Ionsmentioning

confidence: 99%

“…Therefore, several methods have been introduced to eliminate the disperser solvents. 10,11 Recently, considerable interest has been manifested by using room temperature ionic liquids (RTILs) as solvents in a wide range of applications. RTIL is a kind of burgeoning green solvent and can be defined as organic salts that are liquid at or near room temperature.…”

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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“…A green separation and preconcentration of rhodium based ultrasound-assisted dispersive liquid-liquid microextraction (USA-DLLME) method, combined with FASS, was developed by Molaakbari et al [162]. In this work, Rh(III) was transferred into its complex with 5-Br-PADAP and an ultrasonic bath with the ionic liquid, 1-octyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide at room temperature was used to extract the analyte.…”

Section: 36mentioning

confidence: 99%

Separation and Preconcentration by Dispersive Liquid–Liquid Microextraction Procedure: Recent Applications

Ojeda

Rojas

2011

Chromatographia

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Ionic liquid ultrasound assisted dispersive liquid–liquid microextraction method for preconcentration of trace amounts of rhodium prior to flame atomic absorption spectrometry determination

Cited by 81 publications

References 45 publications

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

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

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

Separation and Preconcentration by Dispersive Liquid–Liquid Microextraction Procedure: Recent Applications

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