四种多环芳烃的三维荧光谱解析

Three-dimensional Fluorescence Spectral Analysis of Four Kinds of Polycyclic Aromatic Hydrocarbons

多环芳烃(PAHs)是普遍关注的优先监测污染物,在水环境中其含量很低,但由于其具有高荧光量子产率,可利用荧光法对其进行检测。运用三维荧光光谱法对四种多环芳烃的荧光光谱进行了解析,较二维荧光光谱能更详细地描述PAHs的性质。实验表明:菲与蒽均有三个较强的荧光区域;芘有多个荧光区域;荧蒽有两个荧光区域。菲、蒽、芘和荧蒽的最大荧光峰分别位于250/364 nm、250/402 nm、240/372 nm及286/462 nm。选择最大荧光峰值位置对四种多环芳烃做工作曲线,呈现较好的线性关系。该方法为同时检测水源中多组分痕量PAHs提供了方法基础。

As a universal concern about the monitoring of priority pollutants, polycyclic aromatic hydrocarbons （PAHs） have low content in the water environment. Because of its high fluorescence quantum yields, the fluorescence spectra of PAHs can be used to investigate PAHs concentration. Fluorescence spectra of four kinds of PAHs were analyzed with the method of three-dimensional fluorescence spectra, which can desSribe the characteristics of PAHs more detailedly than two-dimensional fluorescence spectra. Results show that phenanthrene, anthracene have three stronger fluorescence regions, and pyrene, fiuoranthene have several and two fluorescence regions, respectively. The biggest fluorescence peaks of phenanthrene, anthracene, pyrene and fluoranthene are 250/364 nm, 250/402 nm, 240/372 nm and 286/462 nm, respectively. Under the optimum conditions, good linear work curve was obtained by this method to determine four kinds of PAHs. This method serves to the simultaneous analysis of multi-component PAHs in the source water on a method basis.