基于激光诱导荧光技术的蒽检测系统

摘要

介绍了一种用Nd:YAG的三倍频(波长355nm)作为激发光,CCD作为探测单元,加上其他光学元件构成的激光诱导荧光检测系统,并测量了蒽的乙醇溶液的荧光光谱.分析了荧光强度与蒽溶液浓度的关系.实验结果表明,蒽溶液浓度在0.003～0.700mg/L,范围内与荧光强度有良好的线性关系,相关系数为0.9987,检出限为1.3ng/mL,蒽的回收率在98%～106%范围内.系统适合用于蒽的激光诱导荧光检测.%A laser induced fluorescence detection system for the determination of anthracene is described. The system is comprised of a third harmonic Nd:YAG laser (as light source), a CCD (as probing element),and other optical elements. The fluorescence spectrum of anthracene in ethanol solution was measured.The relationship between the fluorescence intensity and the concentration of anthracene solution was studied. The results show that in the range of 0. 003～0. 700mg/L, the concentration and the fluorescence intensity has a good linear relationship. The correlation coefficient is 0. 9987, the detection limit is 1.3ng/mL, and the spiked recoveries are in the range of 98％～106％. The method is suitable for the detection of　anthracene.