Interference Testing for Atmospheric HO sub(x) Measurements by Laser-Induced Fluorescence

The Pennsylvania State University laser-induced fluorescence instrument for measuring the concentrations of atmospheric hydroxyl and hydroperoxyl radicals was evaluated for possible interferences, namely, fluorescence spectral interference and chemical interference. The ground-based instrument is de...

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Published inJournal of atmospheric chemistry Vol. 47; no. 2; p. 169
Main Authors Ren, Xinrong, Harder, Hartwig, Martinez, Monica, Faloona, Ian C, Tan, David, Lesher, Robert L, Di Carlo, Piero
Format Journal Article
LanguageEnglish
Published 01.02.2004
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Summary:The Pennsylvania State University laser-induced fluorescence instrument for measuring the concentrations of atmospheric hydroxyl and hydroperoxyl radicals was evaluated for possible interferences, namely, fluorescence spectral interference and chemical interference. The ground-based instrument is described briefly. In the laboratory and in the field, background signal tests, fluorescence spectral interference tests, and chemical interference tests were conducted. Spectral interference was analyzed for naphthalene, sulfur dioxide, and formaldehyde, and the interfering chemicals tested included hydrogen peroxide, formaldehyde, nitrous acid, nitric acid, and acetone. Results revealed that none of the tested chemicals was able to generate significant interference at levels found even in polluted atmospheres, except for naphthalene.
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ISSN:0167-7764
1573-0662
DOI:10.1023/B:JOCH.0000021037.46866.81