Simultaneous extraction and preconcentration of uranium and thorium in aqueous samples by new modified mesoporous silica prior to inductively coupled plasma optical emission spectrometry determination

Yousefi, Seyed Reza; Ahmadi, Seyed Javad; Shemirani, Farzaneh; Jamali, Mohammad Reza; Salavati‐Niasari, Masoud

doi:10.1016/j.talanta.2009.06.058

Cited by 111 publications

(41 citation statements)

References 37 publications

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“…36 The extraction recovery as the percentage of the total amount of analyte, which was extracted into the eluent (HNO3 solution), and adsorption capacity (q, mg g -1 ) were calculated using Eqs. (1) and (2): 28 Recovery (%) 100,…”

Section: Solid Phase Extraction-preconcentration Proceduresmentioning

confidence: 99%

“…27 To the best of our knowledge up to now, there is just one reported paper on the application of mesoporous materials for preconcentration-determination of uranium ions. 28 In our recent studies the adsorption characteristics of amine and Schiff base functionalized SBA-15 mesoporous silica materials towards Cr(VI), As(V), Hg(II), 29,30 U(VI), 31 Eu(III) and Th(IV) 32 were investigated. It was demonstrated that SBA-15 functionalized adsorbents bearing N-propylsalicylaldimine (SBA/SA) and ethylenediaminepropylesalicylaldimine (SBA/ EnSA) Schiff base ligands are effective adsorbents for the removal-decontamination of water samples containing relatively high concentration of uranyl ions.…”

Section: Introductionmentioning

confidence: 99%

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Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

et al. 2017

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A solid-phase extraction based on a functionalized SBA-15, with the Schiff base ligand, ethylenediaminepropylesalicylaldimine (SBA/EnSA), was developed for the recovery and preconcentration of trace amounts of uranium(VI) in water samples, prior to its determination spectrophotometrically using ArsenazoIII. For optimizing the parameters affecting the adsorption step (pH, adsorbent dose and adsorption time) and those influencing the desorption process (concentration and volume of eluent and desorption time), a statistical technique response surface methodology (RSM) was employed. The limit of detection and the linear dynamic range for the proposed method were 10 μg L -1 , and 33.5 -500 μg L -1 , respectively. The adsorbent showed a high capacity (110.2 mg g -1 ) and the method allowed obtaining a preconcentration factor of 67. The inter-and intra-day relative standard deviations for a solution of 100 μg L -1 (n = 5) were found to be 4.8 -6.2%. The developed method was successfully applied for the determination of U(VI) in water samples.

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Section: Solid Phase Extraction-preconcentration Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

et al. 2017

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“…3,7 The other most important factor is that these analytical techniques are expensive and laboratory technicians with high expertise are required to conduct them. Therefore, due to their simplicity, low cost, and high accuracy, UV-Vis spectrophotometric methods of determination are still preferable and widely used for determination of U(VI).…”

Section: 6mentioning

confidence: 99%

Supramolecular solvent microextraction of uranium at trace levels from water and soil samples

Khan¹,

Yılmaz²,

Soylak³

2017

Turk J Chem

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Abstract:A supramolecular solvent microextraction procedure was established for the separation/preconcentration of uranium(VI) (U(VI)) prior to its determination by UV-Vis spectrophotometry. 1-(2-Pyridylazo)-2-naphthol (PAN) was used to form a red chelate (U-PAN) with U(VI) at pH 10. U-PAN was extracted by undecanol in tetrahydrofuran. All the parameters that affect extraction efficiency like solution pH, amount of ligand, type and volume of supramolecular solvent, sample volume, and diverse ion effect were optimized. The preconcentration factor was 17. The detection limit was 0.31 µ g L −1 . The method was validated using GBW07424 (GSS-10 certified reference material). Microextraction was also applied to water and soil samples.

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“…Ordered mesoporous Al 2 O 3 materials or mesoporous titanium film have also been used as capillary microextraction coating for the preconcentration of trace metal ions. Table 2 summarizes the preconcentration of metal ions by various functionalized mesoporous materials [26,30,[32][33][34][35][36][37][38].…”

Section: Extraction Of Metal Ionsmentioning

confidence: 99%

Recent advances of mesoporous materials in sample preparation

Zhao

Qin

et al. 2012

Journal of Chromatography A

125

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Simultaneous extraction and preconcentration of uranium and thorium in aqueous samples by new modified mesoporous silica prior to inductively coupled plasma optical emission spectrometry determination

Cited by 111 publications

References 37 publications

Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

Supramolecular solvent microextraction of uranium at trace levels from water and soil samples

Recent advances of mesoporous materials in sample preparation

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