Th(IV) ion-imprinted polymer for selective solid-phase extraction of Th(IV) and its analytical applications

Mishra, Smita; Singh, Deepak Kumar

doi:10.1080/19443994.2014.944582

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…On the other hand, surface imprinting may lead to fast kinetics of adsorption/desorption processes in desired applications. There are a number of reports in the literature concerning the synthesis of Th(IV)-IIP materials through bulk and suspension polymerisation [7,8] and surface imprinting techniques [9][10][11][12]. IIPs have been grafted onto silica particles via copolymerisation of functional monomers containing β-diketone group [9], carboxylic group [10,12], pyrazole derivative [11].…”

Section: Introductionmentioning

confidence: 99%

“…Due to its environmental impacts, there is a continued interest in the development of analytical methods to measure trace amounts of thorium ion in surface and sea waters [2][3][4][5][6]. During recent decade, a growing interest was observed in the synthesis and use of ion-imprinted polymers (IIPs) as selective adsorbents to preconcentrate thorium and other various metal ions prior to determination by spectrometric techniques [7][8][9][10][11][12][13]. IIPs have been traditionally synthesised by the bulk polymerisation method.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of ion-imprinted polyvinyl sulfonate-grafted silica particles for trace enrichment of Th(IV) prior to determination by inductively coupled plasma-mass spectrometry

Fasihi

Bavarsad

Shariati

et al. 2016

International Journal of Environmental Analytical Chemistry

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Grafting from polymerisation technique has been used to prepare Th(IV) ion-imprinted polyvinyl sulfonate (IIPVS)-bonded silica particles. The graft polymerisation of vinyl sulfonate (VS) on the surface of silica particles was achieved in aqueous medium through thermal decomposition of surface-bound azo initiators (60°C) in the presence of thorium ion. The prepared material was characterised by Fourier transform infrared spectroscopy, differential scanning calorimetry and thermogravimetric analysis. The entrapped template ion was then removed using 2 M HCl. The experimental batch rebinding data were successfully described by the Langmuir-Freundlich model. The prepared material was then packed to a PTFE micro-column (20 mm × 3.0 mm, id) to evaluate its efficiency in column operations prior to determination by inductively coupled plasma-mass spectrometry (ICP-MS). The limit of detection of the method and breakthrough capacity of the column was evaluated as 0.074 µg L −1 and 0.83 mg g −1 , respectively. The selectivity of the prepared polymer towards Th (IV) ion was investigated in the presence of some foreign competitor ions, including U(VI). Finally, the proposed method has been used to determine Th(IV) ion in real samples. ARTICLE HISTORY

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