标准芳烃及其混合溶液的同步荧光光谱分析

为了提供区分标准芳烃的实验依据,并为环境中芳烃污染检测提供参考.对10个标准芳烃样品(萘、芴、蒽、菲、荧蒽、苊、芘、1,2-苯并[A]蒽、苯并[k]荧蒽、苯并菲)及其混合溶液(蒽、萘、芴混合溶液,苊、荧蒽、菲混合溶液和芘、1,2-苯并[A]蒽、苯并[k]荧蒽、苯并菲混合溶液)的同步荧光特性进行了分析,获得10种标准芳烃标志峰最好时对应的Δλ值及其标志峰位.在此基础上,通过同步荧光光谱分析区分了三种标准芳烃混合溶液的组分,实验发现对蒽、萘、芴混合溶液,Δλ=3 nm时最易区分三种组分|对苊、荧蒽、菲混合溶液,Δλ=3 nm或Δλ=10 nm均可区分三种组分,相对而言,Δλ=10 nm更简便些|对芘、1,2-苯并[A]蒽、苯并[k]荧蒽、苯并菲混合溶液,Δλ=5 nm时是最好的,但也仅能区分芘、1,2-苯并[A]蒽、苯并[k]荧蒽三种组分,苯并菲不确定.

Synchronous Fluorescence Spectra of Standard PAHs and Their Mixed Solutions

In order to provide the basis for differentiating PAHs and test PAHs in environment,snchronous fluorescence spectra of ten kinds of standards PAHs(naphthalene,fluorine,anthracene,phenanthrene,pyrene,acenaphthene,chrysene,1,2-benzo[A] anthracene,benzo[k] fluoranthene,benzophenanthrene) and their mixed solutions(anthracene/ naphthalene/ fluorine,acenaphthene/ fluoranthene/phenanthrene and pyrene /1,2-benzo[A] anthracene/benzo[k] fluoranthene/benzophenanthrene)are measured.The differences of the excitation and emission wavelength Δλ are obtained when the characteristic peaks are the most evident.Based on above results,the composites of the three kinds mixed solutions are identified by synchronous fluorescence spectra.The results show that it is easy to distinguish anthracene,naphthalene and fluorine when Δλ equals 3 nm.For acenaphthene,pyrene and phenanthrene,Δλ equals 3 nm or 10 nm,the three composites can be differentiated.It is relative simple when Δλ equals 10nm.For the mixed solution of chrysene,1,2-benzo[A] anthracene,benzo[k] fluoranthene and benzophenanthrene,it is the best when Δλ equals 5 nm,but only chrysene,1,2-benzo[A] anthracene and benzo[k] fluoranthene could be identified,benzophenanthrene is indefinite.