Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 75, Issue 3, Pages 1043-1046Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2009.12.050
Keywords
CdTe quantum dots; Berberine; Fluorescence quenching
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Funding
- National Natural Science Foundation of China [20875003]
- Natural Science Foundation of Anhui Province [070416239]
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A novel method for the determination of berberine has been developed based on quenching of the fluorescence of thioglycolic acid-capped CdTe quantum dots (TGA-CdTe QDs) by berberine in aqueous solutions. Under optimum conditions, the relative fluorescence intensity was linearly proportional to the concentration of berberine between 2.5 x 10(-8) and 8.0 x 10(-6) mol L-1 with a detection limit of 6.0 x 10(-9) mol L-1. The method has been applied to the determination of berberine in real samples, and satisfactory results were obtained. The mechanism of the proposed reaction was also discussed. (C) 2009 Elsevier B.V. All rights reserved.
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