大气气溶胶中多环芳烃的特征光谱检测技术研究  

Study on Characteristic Spectral Detection Techniques of Polycyclic Aromatic Hydrocarbons in Atmospheric Aerosol

作　　者：蔡小琼[1] 王伯光[1] 唐小东[1] 刘慧璇[1] 

机构地区：[1]暨南大学环境工程系,广东广州510632

出　　处：《分析测试学报》2010年第9期888-894,共7页Journal of Instrumental Analysis

基　　金：广东省科技攻关资助项目(2007B030102004)

摘　　要：采用紫外-可见分光光度法、傅立叶红外光谱法和恒能量同步荧光分析法进行实验室模拟测试,检测蒽、苯并[a]芘、荧蒽、苯并[k]荧蒽、苯并[ghi]苝5种多环芳烃（PAHs）,对比分析了各检测技术的灵敏度、精密度、检出限、线性范围、混合组分图谱分离度等指标。结果表明,恒能量同步荧光法的选择性最好,灵敏度（0.046 0~1.360 5Io.ng-1）和精密度（平均空白的RSD为4.1%）均最高,检出限（0.038~0.427μg.L-1）最低,线性范围较宽（0.126~7 157μg.L-1）,是3种光谱分析法中最适合无分离在线检测气溶胶中多组分PAHs的方法。将该方法应用于实际大气环境气溶胶样品中各PAHs成分的定性鉴别和定量检测,5种PAHs均被检出,各物质的特征峰分离效果好,峰形明显,能满足实际测量的分析要求。A plenty of simulation experiments for the determination of the component and concentration of polycyclic aromatic hydrocarbons（PAHs） mixture in atmospheric aerosol were performed by UV-Vis spectrometry,Fourier transform infrared spectrometry（FTIR） and constant energy synchronous fluorescence spectrometry,respectively.The sensitivities,precisions,detection limits and linear ranges coupled with degree of characteristic spectra resolution of each component in mixtures were compared in detail based on analyzing five representatives of PAHs compounds including anthracene,benzo[a]pyrene,fluoranthene,benzo[k]fluoranthene and benzoperylene.The results showed that the constant energy synchronous fluorescence spectrometry was the best measurement technique of the three spectroscopic measurement methods for its best selectivity,the highest sensitivity with detection limits of 0.038-0.427 μg·L-1,a favorable linear range of 0.126-7 157 μg·L-1,and its on-line analysis of the PAH components in atmospheric aerosol without complex pre-separation courses.The method was successfully applied in analyzing the target PAHs qualitatively and quantitatively in aerosol samples of the real atmosphere with good resolution of characteristic spectra,clear characteristic profiles of the spectra,and could meet the requirements of the real sample detection.

关 键 词：多环芳烃 紫外-可见分光光度法 傅立叶红外光谱法 恒能量同步荧光法 

分 类 号：O657.3[理学—分析化学] TQ413.213[理学—化学]