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A novel method for the determination of Pb2+ based on the quenching of the fluorescence of CdTe quantum dots

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Abstract.

A novel method for the determination of Pb2+ has been developed based on quenching of the fluorescence of thiol-capped CdTe quantum dots (QDs) by Pb2+ in aqueous solutions. Under optimum conditions, the relative fluorescence intensity was linearly proportional to the concentration of Pb2+ between 2.0 × 10−6 and 1.0 × 10−4 mol L−1 with a detection limit of 2.7 × 10−7 mol L−1. The relative standard deviation (RSD) was 4.6% for a 4.0 × 10−5 mol L−1 Pb2+ solution (N = 5). As an application, the proposed method was successfully applied to the analysis of Pb2+ in food samples, and the results were satisfactory, i.e. consistent with those of flame atomic absorption spectrometry (FAAS).

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Authors and Affiliations

  1. College of Science, Institute of Chemical Biology, State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China

    Hongmin Wu, Jiangong Liang & Heyou Han

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  1. Hongmin Wu
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  2. Jiangong Liang
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  3. Heyou Han
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Corresponding author

Correspondence to Heyou Han.

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Correspondence: Heyou Han, College of Science, Institute of Chemical Biology, State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, P.R. China

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Wu, H., Liang, J. & Han, H. A novel method for the determination of Pb2+ based on the quenching of the fluorescence of CdTe quantum dots. Microchim Acta 161, 81–86 (2008). https://doi.org/10.1007/s00604-007-0801-4

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