Detection of aromatic pollutants in the environment by using UV-laser-induced fluorescence
Detection of aromatic pollutants in the environment by using UV-laser-induced fluorescence
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DOI：
10.1007/s003400050535
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发表时间：
1998-10-01
影响因子：
2.1
通讯作者：
Marowsky, G
中科院分区：
文献类型：
--
作者：
Karlitschek, P;Lewitzka, F;Marowsky, G
我们推出了一种紧凑型移动式电池供电激光诱导荧光 (LIF) 系统。它基于具有 UV 频率转换和 7 ns 脉冲持续时间的二极管泵浦固态激光器。激光的三次谐波（355 nm）和四次谐波（266 nm）可以交替使用。该检测系统由多色仪、门控图像增强器和CCD相机组成，可以获取纳秒级时间分辨率的时间分辨光谱。测量了16种US-EPA多环芳烃(PAH)的荧光光谱、衰减时间和检测限，并从多组分混合物中单一PAH的可分离性方面讨论了结果。给出了 16 种组分混合物的数学分析结果。还介绍了受汽油和焦油污染的天然水样的光谱，并讨论了 LIF 技术的潜力和局限性。
We present a compact and mobile battery-operated laser induced fluorescence (LIF) system. It is based on a diode-pumped solid-state laser with UV frequency conversion and a 7-ns pulse duration. The third (355 nm) and fourth (266 nm) harmonics of the laser can be used alternately. The detection system consists of a polychromator, a gated image intensifier, and a CCD camera, which can acquire time-resolved spectra with nanosecond time resolution.Fluorescence spectra, decay times, and detection limits of the 16 US-EPA polycyclic aromatic hydrocarbons (PAH) have been measured and the results are discussed in terms of separability of single PAHs in a multicomponent mixture. The results of a mathematical analysis of a 16-component mixture is presented. Spectra from natural water samples contaminated with gasoline and tar are also presented and the potential and limits of the LIF technique are discussed.