多环芳烃混合物的快速导数-恒能量同步荧光光谱分析

Derivative Constant-energy Synchronous Fluorescence Spectroscopy for Rapid Analysis of Polynuclear Aromatic Hydrocarbon Mixtures

通过选择合适的能量差 (Δν =130 0cm-1)并结合导数技术 ,对 2 ,3 苯并芴、3,4 ,8,9 二苯并芘、苯并[α]芘和 2 ,3 苯并蒽进行了导数恒能量同步荧光分析。结果表明 ,样品只需经 1次扫描 ,即可利用导数恒能量同步荧光光谱对上述多环芳烃 (PAHs)进行同时分析和定量测定 ;二阶导数恒能量同步荧光法测定结果表明 ,2 ,3 苯并芴、3,4 ,8,9 二苯并芘、苯并 [α]芘和 2 ,3 苯并蒽的检出限依次为 0 2 2× 10 -9、0 5 2× 10 -9、0 4 6×10 -9和 0 2 4× 10 -9g/mL。此方法应用于分析海水样、自来水样、大气飘尘样中多环芳烃 ,均取得了良好的效果 ,回收率分别为 87%～ 99 5 %、88%～ 10 1%和 84 %～ 10 5 %

A derivative constant-energy synchronous fluorescence spectroscopy for rapid and simultaneous (analysis) of four polynuclear aromatic hydrocarbons(PAHs):2,3-benzofluorene, benzo\pyrene, 3,4,8,9-dibenzopyrene and 2,3-benzoanthracene has been developed. Only a single scan is needed for the simultaneous identification and quantitative determination of above-mentioned PAHs. The detection limit for 2,3-benzofluorene, benzo\pyrene, 3,4,8,9-dibenzopyrene and 2,3-benzoanthracene is 0.22×10^(-9), 0.52×10^(-9), 0.46×10^(-9) and 0.24×10^(-9) g/mL, respectively. By using this method, the four PAHs in real samples were determined directly and with good results. The recovery of PAHs in tap water, seawater and airborne (particulates) was 87%～99.5%, 88%～101% and 84%～105% respectively.