title: [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].
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 x 10(-4) - 3.1 x 10(-2) microg x mL(-1), the limit of detection was 4.6 x 10(-5) microg x 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.
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China. wanglanaxiao@163.com
authors.forename: Xiao-Mei
authors.initials: XM
authors.lastname: Wang
authors.forename: Chao
authors.initials: C
authors.lastname: Ye
authors.forename: Chen-Gui
authors.initials: CG
authors.lastname: Li
authors.forename: Yu-Zhu
authors.initials: YZ
authors.lastname: Hu
mesh_terms: D003300:Copper / Q000032:analysis*; D031541:Fluorescence Resonance Energy Transfer / Q000379:methods*; D031239:Lonicera / Q000737:chemistry*; D045663:Quantum Dots; D012235:Rhodamines
chemical_list: D012235:Rhodamines; D003300:Copper; C029773:rhodamine B