中文摘要：

建立了一种同时测定水体中多组分溶解态多环芳烃的新方法。为消除共存组分干扰，利用三维荧光谱确定茚、荼和菲的最佳测量点为A（λex250.0nm，λem308.0nm）、B（λex225.0nm，λem335.0nm）、C（λex250．0nm，λem364．0nm）；荼和菲相应的最佳参比波长分别为292．5nm和286．7nm，所建方法用于水体中茚、萘和菲的同时测定。其线性范围分别为：2．00×10^-7－2．00×10^-5mol／L、5．00×10^-8－3．50×10^-6mol／L和1．00×10^-8－1．00×10^-6mol／L；检出限分别为：8．63×10^-9、1．01×10^-8和5．29×10^-10mol／L；相对标准偏差分别为：1．1％、1．0％和0．7％（n=7）。方法用于自来水样和海水样的测定，结果满意。

英文摘要：

A novel method was deveolped for the simultaneous determination of polycyclic aromatic hydrocarbons in interfering multicomponents system in water. The concentrations of indene, naphthalene and phenan-threne in water have been determined directly by using dual-wavelength fluorescence-spectrometry with 3D technique which was used to optimize detection points and reference-wavelenth to eliminate the interference of other components. The point A （λex = 250.0 nm, λem = 308.0nm）, B （λex = 225.0nm, λem= 335.0 nm） and C（λex=250.0 nm,λem =364.0 nm） were chosen as the detection point of indene, naphthalene and phenanthrene, while the wavelengths of 292.5 nm and 286.7 nm were used as the reference-wavelength. The linear ranges for the determination of indene, naphthalene and phenanthrene were 2.00×10^-7-2.00×10^-5mol/L、5.00×10^-8-3.50×10^-6mol/L and 1.00×10^-8-1.00×10^-6mol/L, respectively. The detection limits were 8.63×10^-9、1.01×10^-8mol/L and 5.29×10^-9mol/L with the RSD of 1.1% , 1.0% and 0.7% （n =7） , respectively. Satisfactory results were obtained for the determination of dissolved indene, naphthalene and phenanthrene in tap water and sea water.