提出了快速直接对土壤中多环芳烃污染物进行荧光检测的方法——激光诱导荧光光谱技术, 以多环芳烃蒽为研究对象, 实验验证了激光诱导荧光光谱技术快速检测土壤中蒽污染物的可行性。 采用AvaSpec-2048TEC型热电制冷式光纤光谱仪对土壤中的蒽进行直接测量, 研究结果表明: 当土壤中蒽浓度在一定范围内(0.000 005～0.001 g·g-1)时, 其诱导荧光强度与蒽的浓度成线性关系（其相关系数R为0.929）, 这就表明了激光诱导荧光光谱技术直接对土壤中多环芳烃污染物测量是可行的。 该技术可以在不需要对样品进行复杂预处理的条件下进行测试, 这对实现土壤中PAH污染物实时、 在线、 现场测量具有重要的意义。

In the present paper, a technique of laser-induced fluorescence（LIF）for direct assay of polycyclic aromatic hydrocarbons(PAH) in soil was put forward. The research objective of this article is anthracene. The possibility of using LIF spectra to detect directly anthracene in soil was studied. Anthracene was detected in soil by AvaSpec-3648 Fiber Optic Spectrometer of thermoelectric refrigeration. The authors drew a conclusion that in the range of certain anthracene concentration(0.000 005～0.001 g·g-1), the intensity of LIF fluorescence is linear with anthracene concentration in soil, with a regression coefficient of 0.929. This showed that direct assay of anthracene in soil was feasible by laser-induced fluorescence. The study is important to developing a new analytical technique of quantitative fluorescence detector which can be applied to the analysis of PAH in soil without pretreatment, and is significant to realization of real-time, in-line, in-situ measurement of PAH in soil.