Laser-Induced Solid-Surface Room-Temperature Phosphorimetry of Polycyclic Aromatic Hydrocarbons

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Abstract:

Laser-induced solid-surface room-temperature phosphorimetry (SSRTP) has been employed for the detection of polycyclic aromatic hydrocarbons. A nitrogen-pumped laser and a dye laser were used as excitation sources. The effects of sample volume, laser irradiation, and background reduction treatment on the precision and sensitivity of the method were studied. With the use of thallium(I) acetate as a phosphorescence enhancer, picogram limits of detection were estimated for phenanthrene, pyrene, benzo[g,h,t]perylene, chrysene, coronene, and 1,2-benzofluorene. The study demonstrates that laser excitation can improve the sensitivity of SSRTP by up to three orders of magnitude.

Keywords: Laser-induced SSRTP; Low-background substrate; PAHs; RTP

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702963906401

Affiliations: 1: Health Sciences Research Division, Advanced Monitoring Development Group, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830; permanent address: Departamento de Quimica, Universidade de Brasilia, Brasilia, DF, Brazil, CEP 70910-900 2: Health Sciences Research Division, Advanced Monitoring Development Group, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830

Publication date: February 1, 1996

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