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Determination of Se(IV) using solidified floating organic drop microextraction coupled to ultrasound-assisted back-extraction and hydride generation atomic fluorescence spectrometry

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Abstract

A method is presented for matrix separation, preconcentration and determination by hydride generation atomic fluorescence spectrometry of trace amounts of Se(IV). It is based on solidified floating drops of 1-undecanol that are capable of extracting the target analyte after chelation with a water soluble ligand and subsequent ultrasound-assisted back-extraction into a aqueous solution. Hydride generation was then accomplished by reaction with a solution of sodium borohydride. Under optimized conditions, an enrichment factor of 15 and a linear calibration plot in the range from 0.01 to 5.0 μg L−1 were achieved using a 10.0 mL sample. The detection limit (3σ) is 7.0 ng L−1, and the relative standard deviation (RSD) is 2.1% at 1.0 μg L−1 (n = 11). The method was applied to determination of Se(IV) in different real water samples through recovery experiments and subsequently validated against two certified reference materials.

A solidified floating organic drop microextraction coupled with hydride generation atomic fluorescence spectrometry for the determination of Se(IV) is described.

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Acknowledgements

This work was supported by Innovative Project Foundation of Yangzhou University (2010CXJ015).

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  1. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China

    Yang Wang, Xiaoyu Luo, Jie Tang & Xiaoya Hu

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  1. Yang Wang
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  2. Xiaoyu Luo
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  3. Jie Tang
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  4. Xiaoya Hu
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Correspondence to Yang Wang.

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Wang, Y., Luo, X., Tang, J. et al. Determination of Se(IV) using solidified floating organic drop microextraction coupled to ultrasound-assisted back-extraction and hydride generation atomic fluorescence spectrometry. Microchim Acta 173, 267–273 (2011). https://doi.org/10.1007/s00604-011-0574-7

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  • DOI: https://doi.org/10.1007/s00604-011-0574-7

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