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Ionic liquid-based hollow fiber supported liquid membrane extraction combined with thermospray flame furnace AAS for the determination of cadmium

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Abstract

We have developed a simple and effective method for hollow fiber liquid-phase microextraction of cadmium. It is based on the use of a room temperature ionic liquid (RTIL) and was coupled to thermospray flame furnace AAS. The RTIL was placed in the pores of a polypropylene hollow fiber (acting as a liquid membrane) and also used as the acceptor solution. Ammonium pyrrolidinedithiocarbamate (APDC) was used as the chelating agent. The effects of the concentration of APDC, the pH of samples, stirring rates, extraction time, and potential interferences were optimized to result in a detection limit of 9 ng L−1 and an enrichment factor of 90. The relative standard deviation is 4.7% (at 0.5 ng mL−1, for n = 5). The method was successfully applied to the determination of cadmium.

Schematic diagram of the TS-FF- AAS system.

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Acknowledgements

The authors gratefully acknowledge the financial support for this project from the Foundation of Education of Guangxi (200911MS204) and Foundation of Doctor of Yulin Normal College (G2010004).

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Authors and Affiliations

  1. Department of Chemistry and Material, Yulin Normal College, Yulin, Guangxi, 537000, China

    Chujie Zeng & Jiwen Luo

  2. Textile Printing Chemistry & Environment Engineering Department, Chengdu Textile College, Chengdu, Sichuan, 611731, China

    Yan Hu

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  1. Chujie Zeng
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  2. Yan Hu
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  3. Jiwen Luo
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Correspondence to Chujie Zeng.

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Zeng, C., Hu, Y. & Luo, J. Ionic liquid-based hollow fiber supported liquid membrane extraction combined with thermospray flame furnace AAS for the determination of cadmium. Microchim Acta 177, 53–58 (2012). https://doi.org/10.1007/s00604-011-0748-3

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  • DOI: https://doi.org/10.1007/s00604-011-0748-3

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