A UV-Photofragmentation/Laser-Induced Fluorescence Sensor for the Atmospheric Detection of HONO

Michael O. Rodgers, Douglas D. Davis

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

An in situ laser-based detection system for measuring atmospheric HONO has been built and tested. This spectroscopic selective system has been tested for numerous chemical interferences. The results from these tests indicate that down to the tens of parts per trillion HONO concentration range no significant problems were detected. Sampling losses were also evaluated under varying atmospheric conditions and were found to be negligible at ambient levels of HONO amenable to controlled testing, e.g., the low ppbv range. The PF-LIF system as currently configured has a detection limit in the low tens of parts per trillion concentration range for typical integration times of 15 min in duration. This sensitivity is roughly equivalent to that achieved by the long-path differential absorption technique, but the PF-LIF has the added feature of being fully mobile and capable of in situ HONO measurements.

Original languageEnglish
Pages (from-to)1106-1112
Number of pages7
JournalEnvironmental Science and Technology
Volume23
Issue number9
DOIs
StatePublished - Sep 1989
Externally publishedYes

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