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Synthesis and characterization of an ion-imprinted polymer for selective solid phase extraction of thorium(IV)

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Abstract

A new surface ion-imprinted composite polymer containing 3-methyl-1-phenyl −4-(cis-acylbutenoic acid)-2-pyrazolin-5-one as the functional reagent is presented that is capable of extracting and preconcentrating traces of Th(IV) ion prior to its photometric determination. Parameters affecting the recovery of Th(IV) such as acidity, shaking time, initial concentration of Th(IV), elution condition, sample flow rate, and influence of potentially interfering ions were investigated. The maximum uptake capacity of this material and that of the non-imprinted polymer at pH 4.5 are 56.8 and 26.3 mg g−1, respectively. Recovery exceeds 95% and is complete within 5 min. A Langmuir isotherm fits the experimental data. The relative selectivity factor for Th(IV)/U(VI), Th(IV)/La(III), and Th(IV)/Ce(III) are 50.8, 78.3, and 82.6, respectively. The relative standard deviation is <2.5%, the detection limit is 0.54 μg L−1 (3σ). The imprinted polymer was coupled to spectrophotometry to separate and determine trace levels of Th(IV) in a soil standard material with satisfactory results.

A new surface imprinted composite polymer containing MPABAP as the functional reagent was synthesized, and a relative standard deviation (R.S.D.) less than 2.5% and a detection limit of 0.54 μg L−1 (3σ) of the present method under the optimized conditions were obtained.

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Acknowledgement

This research was supported by the Nature Science Fund of the Hunan Province (No. 10JJ6025).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, University of South China, 28 Changsheng West Road Hengyang, Hunan, 421001, People’s Republic of China

    Zhiqiang Cheng, Hongqing Wang, Yuyuan Wang, Fangfang He, Haisheng Zhang & Shiqing Yang

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  1. Zhiqiang Cheng
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  2. Hongqing Wang
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  3. Yuyuan Wang
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  4. Fangfang He
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  5. Haisheng Zhang
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Correspondence to Hongqing Wang.

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Cheng, Z., Wang, H., Wang, Y. et al. Synthesis and characterization of an ion-imprinted polymer for selective solid phase extraction of thorium(IV). Microchim Acta 173, 423–431 (2011). https://doi.org/10.1007/s00604-011-0576-5

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  • DOI: https://doi.org/10.1007/s00604-011-0576-5

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