Detection of aromatic pollutants in the environment by using UV-laser-induced fluorescence

被引：58

作者：

Karlitschek, P ^{[1
]}

Lewitzka, F ^{[1
]}

Bunting, U ^{[1
]}

Niederkruger, M ^{[1
]}

Marowsky, G ^{[1
]}

机构：

[1] Laser Lab Gottingen eV, D-37016 Gottingen, Germany

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 1998年 / 67卷 / 04期

关键词：

D O I：

10.1007/s003400050535

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页码：497 / 504

页数：8