双波长荧光法同时测定水溶解态的茚、萘和菲  

Simultaneous Determination of Dissolved Indene,Naphthalene and Phenanthrene in Aqueous Solution by Dual-wavelength Fluorescent Technique

作　　者：陈佳宁[1] 蔡宗群[1] 朱亚先[2] 张勇[1] 

机构地区：[1]厦门大学环境科学研究中心近海海洋环境科学国家重点实验室,厦门361005 [2]厦门大学化学系,厦门361005

出　　处：《分析化学》2008年第3期301-305,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目(No.20577037,405210003)

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、萘和菲的最佳测量点为A(λex250.0nm,λem308.0nm)、B(λex225.0nm,λem335.0nm)、C(λex250.0nm,λem364.0nm);萘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。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.

关 键 词：舣波长荧光法 三维荧光 溶解态 多环芳烃 

分 类 号：X832[环境科学与工程—环境工程] O657.3[理学—分析化学]