Synthesis of salicylaldehyde-modified mesoporous silica and its application as a new sorbent for separation, preconcentration and determination of uranium by inductively coupled plasma atomic emission spectrometry

Jamali, Mohammad Reza; Assadi, Yaghoub; Shemirani, Farzaneh; Hosseini, M. Reza; Rahnama, Reyhaneh; Masteri‐Farahani, Majid; Salavati‐Niasari, Masoud

doi:10.1016/j.aca.2006.07.006

Cited by 142 publications

(59 citation statements)

References 34 publications

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“…The analytical procedures for the determination of uranium comprises mainly of inductively coupled plasma-MS (ICP-MS) [1][2][3][4][5], inductively coupled plasma-atomic emission spectrometry (ICP-AES) [6], total reflection X-ray fluorescence spectrometry [7], activation analysis [8], cathodic striping voltammetry [9], kinetic phosphorescence [10], fluorimetery [11], spectrophotometry [12,13], and HPLC [14][15][16][17]. HPLC methods combined with precolumn derivatization are interesting, especially when an appropriate complexing reagent is used.…”

Section: Introductionmentioning

confidence: 99%

Determination of uranium, iron, copper, and nickel from ore samples by MEKC using N,N′‐ethylene bis(salicylaldimine) as complexing reagent

2008

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An analytical procedure has been developed for the separation of dioxouranium(VI), iron(III), copper(II), nickel(II), cobalt(II), cobalt(III), palladium(II), and thorium(IV) by MEKC using N,N'-ethylene bis(salicylaldimine) (H(2)SA(2)en) as a complexing reagent with total runtime <4.5 min. SDS was used as micellar medium at pH 8 with sodium tetraborate buffer (0.1 M). An uncoated fused-silica capillary with an effective length of 50 cm x 75 microm id was used with an applied voltage of 30 kV with photodiode array detection at 231 nm. Linear calibrations were obtained within 0.111-1000 microg/mL of each element with LODs within 37-325 ng/mL. The developed method was tested for analysis of uranium ore samples indicating its presence within 103-1789 microg/g with RSD within 0.79-1.87%. Likewise copper, nickel, and iron in their combined matrix were also simultaneously determined with RSD 0.4-1.6% (n = 6).

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Section: Introductionmentioning

confidence: 99%

Determination of uranium, iron, copper, and nickel from ore samples by MEKC using N,N′‐ethylene bis(salicylaldimine) as complexing reagent

2008

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“…[1][2][3][4][5] Silica is the most highly porous nanostructured material currently available, and has a large surface area, high porosity, and low bulk density. 6 In contrast with silica prepared with expensive alkoxides like tetraethoxysilane (TEOS), 7 our silica can be prepared in mass production for use in the industry by sol-gel polymerization of inexpensive sodium silicate precursor and dried at atmospheric pressure for green chemistry.…”

Section: Introductionmentioning

confidence: 99%

Multinuclear Solid-state NMR Investigation of Nanoporous Silica Prepared by Sol-gel Polymerization Using Sodium Silicate

Kim¹,

Han²,

Kim³

2011

Bulletin of the Korean Chemical Society

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Multinuclear solid-state nuclear magnetic resonance (NMR) experiments were performed to investigate the local structure changes of nanoporous silica during hydrothermal treatment and surface modification with 3-aminopropyltriethoxysilane (3-APTES). The nanoporous silica was prepared by sol-gel polymerization using inexpensive sodium silicate as a silica precursor. Using 1 H magic angle spinning (MAS) NMR spectra, the hydroxyl groups, which play an important role in surface reactions, were probed. Various silicon sites such as Q 2 , Q 3 , Q 4 , T 2 , and T 3 were identified with 29 Si cross polarization (CP) MAS NMR spectra and quantified with 29Si MAS NMR spectra. The results indicated that about 25% of the silica surface was modified. 1 H and 29 Si NMR data proved that the hydrothermal treatment induced dehydration and dehyroxylation. The 13 C CP MAS and 1 H MAS NMR spectra of 3-APTES attached on the surface of nanoporous silica revealed that the amines of the 3-aminopropyl groups were in the chemical state of NH 3 + rather than NH 2 .

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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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Synthesis of salicylaldehyde-modified mesoporous silica and its application as a new sorbent for separation, preconcentration and determination of uranium by inductively coupled plasma atomic emission spectrometry

Cited by 142 publications

References 34 publications

Determination of uranium, iron, copper, and nickel from ore samples by MEKC using N,N′‐ethylene bis(salicylaldimine) as complexing reagent

Determination of uranium, iron, copper, and nickel from ore samples by MEKC using N,N′‐ethylene bis(salicylaldimine) as complexing reagent

Multinuclear Solid-state NMR Investigation of Nanoporous Silica Prepared by Sol-gel Polymerization Using Sodium Silicate

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

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