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Citation: YIN Pengfei, GONG Huiping, LIU Zhengqing, WANG Xiaodan, LI Pingping, HE Youqiu. Determination of Jatrorrhizine Hydrochloride by Core-shell CdTe/CdS Quantum Dots with Fluorescence Quenching Method[J]. Chinese Journal of Applied Chemistry, ;2012, 29(3): 320-326. doi: 10.3724/SP.J.1095.2012.00163 shu

Determination of Jatrorrhizine Hydrochloride by Core-shell CdTe/CdS Quantum Dots with Fluorescence Quenching Method

1.
School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China

Corresponding author: HE Youqiu,
Received Date: 19 April 2011
Available Online: 30 June 2011
Fund Project: 发光与实时分析重庆市重点实验室(西南大学)资助项目(CSTC,2006CA8006) (西南大学)资助项目(CSTC,2006CA8006)

The mercaptoacetic acid(TGA) stabilized core-shell CdTe/CdS quantum dots(TGA-CdTe/CdS QDs) were synthesized using as stabilizer.A new method for the determination of jatrorrhizine hydrochloride has been developed based on the quenching of the fluorescence of TGA-CdTe/CdS QDs at excitation wavelength of 340 nm.The paper utilized fluorescence spectrometry and ultraviolet-visible(UV-Vis) absorption spectra to study the interaction between TGA-CdTe/CdS QDs and jatrorrhizine hydrochloride(JH).Under optimized conditions,in which at the pH value is 7.4 using tris-HCl buffer solution,the quenched fluorescence intensity of TGA-CdTe/CdS QDs was linearly proportional with a correlation coefficient r=0.9991,and the limits of detection were in the range of 0.011~10 mg/L and the detection limit for JH(3σ) was 3.3×10^-3 mg/L.JH could be conveniently and quantitatively detemined using this new method.
- Jatrorrhizine hydrochloride,
- Core-shell CdTe/CdS quantum dots,
- UV-Vis,
- fluorescence quenching method
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