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- W2374323218 abstract "Objective To establish a fast,ultra-sensitive and highly selective method for Pb(Ⅱ) fluorescent probes with CdTe/CdS QDs-rhodamine B system.Methods The optimum conditions for fluorescence resonance energy transfer between CdTe/CdS QDs and rhodamine B were studied.According to the phenomenon that Pb2 +quenched the fluorescence of CdTe/ CdS in the energy transfer system,we finally determined the content of Pb2 +.Results The extent of fluorescence quenching was proportional to the trace concentration of Pb(Ⅱ) from 3.85×10-10 to 9.62×10-9mol.L-1 with a correlation coefficient of 0.997 5.The relative standard deviation of 0.32%(38.5×10-10mol.L-1,n = 9) was obtained.The proposed method was successfully applied in the analysis of Pb(Ⅱ) in spinach and citrus leaves with QDs-RhB.The contents of Pb(Ⅱ) were 69.6 and 55.2 μmol.kg-1,respectively.The results were reliable,with no difference compared with those of atomic absorption spectrometry.Conclusion The system,as a fluorescent probe of Pb(Ⅱ),is simple,economical,sensitive and selective." @default.
- W2374323218 created "2016-06-24" @default.
- W2374323218 creator A5006921239 @default.
- W2374323218 date "2013-01-01" @default.
- W2374323218 modified "2023-09-25" @default.
- W2374323218 title "CdTe/CdS-Rhodamine B for the determination of lead (II)" @default.
- W2374323218 hasPublicationYear "2013" @default.
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