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以齐药二厂的假药事件为背景,对1,2-丙二醇、1,3-丙二醇和二甘醇的吸收光谱和荧光光谱进行了测量,实验结果证明光谱法不失为一种快捷有效的区分手段。在紫外吸收光谱中,可以通过最大吸光度的差异区分二甘醇和丙二醇;在一定紫外波长激励下,三种醇的荧光光谱特性均存在差异,以此可以对三种醇作出有效区分;在230nm激发下,将二甘醇和两种丙二醇分别混合,混合溶液的相对荧光强度均与两种丙二醇体积比呈线性反比关系,这在一定程度上证明了二甘醇的荧光量子效率大于两种丙二醇。
The absorption and fluorescence spectra of 1,2-propanediol, 1,3-propanediol and diethylene glycol were measured in the background of counterfeit drugs from Qianyang No.2 Factory. The experimental results show that the spectroscopic method is a quick and effective method to distinguish means. In the ultraviolet absorption spectrum, the difference of the maximum absorbance can distinguish between diethyleneglycol and propyleneglycol. Fluorescence spectrum characteristics of the three alcohols are different under a certain ultraviolet wavelength excitation, so that the three alcohols can be effectively distinguished; at 230 nm excitation The relative fluorescence intensity of the mixed solution was inversely proportional to the volume ratio of two kinds of propylene glycol, which to some extent proved that the fluorescence quantum efficiency of diethylene glycol than two kinds of propylene glycol.