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-可见光谱和荧光光谱研究了TGA-CdTe/CdS QDs与盐酸巴马汀(PC)的相互作用机理.结果表明,在pH=7.4的Tris-HCl 缓冲液中,QDs与PC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=0.997),线性范围为25～1×104 ng/mL,检出限(3σ)为7.7 ng/mL.建立了一种快速简便、可定量测定PC的新方法.%Core-shell CdTe/CdS quantum dots (QDs) were synthesized using mercaptoacetic acid as stabilizer. A novel method for the determination of palmatine chloride(PC) was developed based on the quenching of the fluorescence of CdTe/CdS QDs at an excitation wavelength of 340 nm. Fluorescence spectrometry and ultraviolet-visible(UV-Vis) absorption spectra were utilized to study the interaction between CdTe/CdS QDs and PC. With the optimum reaction conditions of pH = 7. 4 Tris-HCl buffer solution, the quenched fluorescence intensity of CdTe/CdS QDs was linearly proportional to the concentration of PC with a correlation coefficient of r=0. 997, and the detection limits were in the range of 25-l×l04 ng/mL and the detection limit (3σ) for PC was 7. 7 ng/mL. This new method can quickly, simply, conveniently and quantitatively detemine PC.
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