| 光谱学与光谱分析 |
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| Study on the Fluorescence Resonance Energy Transfer between CdTe QDs and Rhodamine B and Its Application to the Determination of Trace Amount of Copper in Flos Lonicerae Japonicae |
| WANG Xiao-mei1, YE Chao1, LI Chen-gui1, HU Yu-zhu1, 2* |
1. Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China
2. Key Laboratory of Drug Quality Control and Pharmacovigilance Affiliated to Ministry of Education, China Pharmaceutical University, Nanjing 210009, China |
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Abstract The present work is to find the optimum condition for fluorescence resonance energy transfer between CdTe QDs (donor) and rhodamine B (acceptor) and form a new method to detect copper in Flos Lonicerae Japonicae. In tris-HCl buffer solution at pH 6.00, by employing cetyltrimethylammonium bromide, Cu2+ can quench the fluorescence intensity of BRB and detect the concentration of Cu2+. Results show that a linear relationship could be established between the quenched fluorescence intensity of RhB and the concentration of Cu2+ in the range of 1.3×10-4～3.1×10-2 μg·mL-1, the limit of detection was 4.6×10-5 μg·mL-1 (r=0.996), RSD and the average recovery was 3.5% and 103.4% (n=5), respectively. It is concluded that the developed method was proved to be feasible to detect copper in Flos Lonicerae Japonicae.
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Received: 2010-03-04
Accepted: 2010-05-05
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Corresponding Authors:
HU Yu-zhu
E-mail: njhuyuzu@126.com
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