Abstract

A pulsed xenon flashlamp unit was developed to provide a sensitive, economical, and compact device for determination of ambient NO2 concentrations. The basic principles of operation are similar to a laser fluorescence monitor previously developed at the Aerospace Corporation that detects the atmospheric NO2 by the fluorescence resulting from absorption of laser radiation. The prototype flashlamp unit has a sensitivity of 5 ppb for a 1.3-min integration time, a linear response, and provides a direct digital readout in real time. Results obtained in monitoring ambient NO2 levels in the vicinity of the Aerospace Corporation are presented.

© 1977 Optical Society of America

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