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Fast and selective magnetic solid phase extraction of trace Cd, Mn and Pb in environmental and biological samples and their determination by ICP-MS

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Abstract

We have immobilized iminodiacetic acid on mesoporous Fe3O4@SiO2 microspheres and used this material for efficient and cost effective method of magnetic solid phase extraction (SPE) of trace levels of Cd, Mn and Pb. The microspheres were characterized by infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. The loaded microspheres can be easily separated from the aqueous sample solution by applying an external magnetic field. The effects of pH, sample volume, concentration and volume of eluent, and of interfering ions were investigated in detail. The method has detection limit of 0.16, 0.26 and 0.26 ng L−1 for the ions of Cd, Mn and Pb, respectively, and the relative standard deviations (RSDs, c = 1 μg L−1, n = 7) are 4.8%, 4.6% and 7.4%. The method was successfully applied to the determination of these metals in biological and environmental samples using ICP-MS. Two certified reference materials were analyzed, and the results coincided well with the certified values.

Mesoporous Fe3O4@SiO2@IDA magnetic particles for fast and selective magnetic solid phase extraction of trace Cd, Mn and Pb from environmental and biological samples followed by inductively coupled plasma mass spectrometry detection.

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Acknowledgments

The authors would like to thank the National Nature Science Foundation of China (No. 20975076) and Science Fund for Creative Research Groups of NSFC (No. 20621502, 20921062) for their financial supports.

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Authors and Affiliations

  1. Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, 430072, People’s Republic of China

    Nan Zhang, Hanyong Peng, Shen Wang & Bin Hu

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  1. Nan Zhang
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  2. Hanyong Peng
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  3. Shen Wang
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  4. Bin Hu
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Correspondence to Bin Hu.

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Zhang, N., Peng, H., Wang, S. et al. Fast and selective magnetic solid phase extraction of trace Cd, Mn and Pb in environmental and biological samples and their determination by ICP-MS. Microchim Acta 175, 121–128 (2011). https://doi.org/10.1007/s00604-011-0659-3

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  • DOI: https://doi.org/10.1007/s00604-011-0659-3

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