Abstract
CdTe quantum dots (QDs) were modified with thioglycolic acid (TGA) and synthesized in aqueous medium. The optimum fluorescence intensity was found to be at pH 6.24 with a CdTe QDs concentration of 4.96 × 10−7 mol L−1. The quenched fluorescence intensity of CdTe QDs is linearly proportional to V(V) concentration from 10 to 200 ng mL−1 with correlation coefficient R = 0.9985. The limit of detection for V(V) was 2.07 ng mL−1. The proposed method was successfully applied to the analysis of trace amounts of V(V) in water samples with recovery of 96.5–101.8%, and the results were in good agreement with those of electrothermal atomic absorption spectrometry.
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Acknowledgements
This work was supported by the Natural Science Foundation of Guangxi Autonomous Region, China (nos 0728218 and 0679005), the Innovation Project of Guangxi Graduate Education (2009105960703 M17), and the Program for Doctor Scientific Research Fund in Guilin University of Technology.
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Hou, M., Na, J. Determination of vanadium(V) with CdTe quantum dots as fluorescent probes. Anal Bioanal Chem 397, 3589–3593 (2010). https://doi.org/10.1007/s00216-010-3900-8
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DOI: https://doi.org/10.1007/s00216-010-3900-8