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Measuring Atmospheric Naphthalene with Laser-induced Fluorescence : Volume 4, Issue 1 (19/01/2004)

By Martinez, M.

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Book Id: WPLBN0003997610
Format Type: PDF Article :
File Size: Pages 21
Reproduction Date: 2015

Title: Measuring Atmospheric Naphthalene with Laser-induced Fluorescence : Volume 4, Issue 1 (19/01/2004)  
Author: Martinez, M.
Volume: Vol. 4, Issue 1
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2004
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Ren, X., Lesher, R. L., Harder, H., Brune, W. H., & Martinez, M. (2004). Measuring Atmospheric Naphthalene with Laser-induced Fluorescence : Volume 4, Issue 1 (19/01/2004). Retrieved from http://ebooklibrary.org/


Description
Description: Department of Meteorology, Pennsylvania State University, University Park, Pennsylvania, USA. A new method for measuring gas-phase naphthalene in the atmosphere is based on laser-induced fluorescence at low pressure. The fluorescence spectrum of naphthalene near 308 nm was identified. Naphthalene fluorescence quenching by N2, O2 and H2O was investigated in the laboratory. No significant quenching was found for H2O with mixing ratio up to 2.5%. The quenching rate of naphthalene fluorescence is (1.98±0.18)×10−11 cm3 molecule−1 s−1 for N2, and (2.48±0.08)×10−10 cm3 molecule−1 s−1 for O2 at 297 K. Instrument calibrations were performed with a range of naphthalene mixing ratios between 5 and 80 parts per billion by volume (ppbv, 10−9. In the current instrument configuration, the detection limit is estimated to be about 20 parts per trillion by volume (pptv, 10−12) with 2Σ confidence and a 1-min integration time. Measurement of atmospheric naphthalene in three cities, Nashville, TN, Houston, TX, and New York City, NY, are presented. Good correlation between naphthalene and major anthropogenic pollutants is found.

Summary
Measuring atmospheric naphthalene with laser-induced fluorescence

 

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