矿物油-乙醇溶液三维荧光光谱的实验研究  

Experimental Studies on Three-Dimensional Fluorescence Spectral of Mineral Oil in Ethanol

作　　者：肖雪[1] 张玉钧[1] 王志刚[1] 金丹[1] 殷高方[1] 赵南京[1] 刘文清[1] 

机构地区：[1]中国科学院环境光学与技术重点实验室,中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《光谱学与光谱分析》2010年第6期1549-1554,共6页Spectroscopy and Spectral Analysis

基　　金：国家(863计划)项目(2007AA061502);安徽省自然科学基金项目(090415215)资助

摘　　要：研究了矿物油-乙醇溶液的三维荧光光谱特性。通过空白扣除法消除了乙醇的拉曼散射对矿物油三维荧光光谱的影响,而采用将瑞利散射及其附近区域置零的方法去除了瑞利散射对矿物油三维荧光光谱的影响。经校准,矿物油的三维荧光光谱特征荧光峰表现为:煤油主要为一个宽峰,最大激发/发射荧光峰的位置在270/290nm附近;0#柴油有两个峰,最大激发/发射峰分别位于240/344nm和270/362nm附近;润滑油存在多个荧光峰,其中两个比较强的最大激发/发射峰分别位于240/348nm和258/358nm附近。此外,还研究了矿物油的荧光光谱强度与浓度的关系,并对测量的灵敏度和检测限进行了分析。研究表明,利用三维荧光光谱特征测量可以实现低浓度矿物油的测定。Three-dimensional excitation-emission matrix （EEM） fluorescence spectroscopy was applied to characterize the mineral oil in ethanol.In the paper,a simple way of treating the first-order Rayleigh,Raman and second-order Rayleigh scatter is used involving subtracting an EEM of a solvent blank,and removing and replacing the values with zeros.The corrected results showed that the characteristic three-dimensional fluorescence spectra of mineral oil were as follows：there was one mainly peak in the fluorescence spectrum of the kerosene,and the peak was identified at excitation/emission wavelengths （Ex/Em） of 270/290 nm;there were two intense fluorescence peaks in the fluorescence spectrum of 0# diesel,located at （Ex/Em） of 240/344 nm and 270/362 nm respectively;there were several fluorescence peaks in the fluorescence spectrum of lubricating oil,with the two intense peaks located at （Ex/Em） of 240/348 nm and 258/358 nm respectively.Furthermore,the relation between the relative fluorescence intensity and the concentration of mineral oil was studied,and the sensitivity and the limitation of detection of the method were also analyzed.The results of this study show that the method of three-dimensional fluorescence can be used to detect the low concentration of oil.

关 键 词：矿物油 三维荧光光谱 散射 

分 类 号：O657.3[理学—分析化学]