引用本文:
殷鹏飞, 龚会平, 刘正清, 王晓丹, 李萍萍, 何佑秋. 紫外-可见吸收、荧光光谱研究壳核型CdTe/CdS量子点与盐酸药根碱的相互作用及其应用[J]. 应用化学,
2012, 29(3): 320-326.
doi:
10.3724/SP.J.1095.2012.00163
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
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
紫外-可见吸收、荧光光谱研究壳核型CdTe/CdS量子点与盐酸药根碱的相互作用及其应用
摘要:
合成了巯基乙酸(TGA)修饰的壳核型CdTe/CdS量子点(TGA-CdTe/CdS QDs)。利用紫外-可见光谱吸收、荧光光谱研究TGA-CdTe/CdS QDs与盐酸药根碱(JH)的相互作用机理。在pH值为7.4的tris-HCl缓冲溶液介质中,QDs与JH相互作用后使QDs的荧光呈线性猝灭,并有良好的线性关系(r=0.999 1),线性范围0.011~10 mg/L,检出限(3σ)为3.3×10-3 mg/L,因此可以作为一种快速、简便、定量测定盐酸药根碱的新方法。
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关键词:
- 盐酸药根碱
- / 壳核型CdTe/CdS量子点
- / 紫外-可见吸收
- / 荧光猝灭法
English
Determination of Jatrorrhizine Hydrochloride by Core-shell CdTe/CdS Quantum Dots with Fluorescence Quenching Method
Abstract:
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.
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