TIAN Li, ZHAO Yue, WANG Xue-rong etc. Electrochemiluminescent Determination of Norepinephrine by CdSe/ZnS Quantum Dot Modified Gold Electrode[J]. Chinese Journal of Luminescence, 2018,39(7): 1024-1028
TIAN Li, ZHAO Yue, WANG Xue-rong etc. Electrochemiluminescent Determination of Norepinephrine by CdSe/ZnS Quantum Dot Modified Gold Electrode[J]. Chinese Journal of Luminescence, 2018,39(7): 1024-1028 DOI: 10.3788/fgxb20183907.1024.
Electrochemiluminescent Determination of Norepinephrine by CdSe/ZnS Quantum Dot Modified Gold Electrode
Mercaptopropionic acid capped CdSe/ZnS quantum dots(QDs) were synthesized in aqueous solution. The CdSe/ZnS QDs modified gold electrode was prepared. The electrochemical luminescence of this modified electrode was studied. Several experiment factors
such as pH of buffer solution
the concentration of CdSe/ZnS QDs
scan rate and rest time were selected. The results show that the CdSe/ZnS modified electrode has an obvious ECL signal of luminol systems in alkaline media
and norepinephrine can enhance electrochemical luminescence(ECL) signal of the luminol system. Based on these
a novel electrochemical luminescence method for the determination of norepinephrine was developed. Under the optimum conditions
ECL intensities had good linearity with the concentration of norepinephrine and the linear range was widely extended from 2.310
-5
-1.010
-8
mol/L. The linear regression equation is I
ECL
=118.788
C
NE
-15.333
and the correlation coefficient was 0.994 4. The detection limit is 0.3310
-8
mol/L.
关键词
Keywords
references
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