Improved continuous measurement system for atmospheric total peroxy and total organic nitrate under the high NOx condition
Nagomi Ohara,
Takahiro Shioji,
Jun Matsumoto
et al.
Abstract:We improved the thermal dissociation cavity attenuated phase shift spectroscopy (TD-CAPS) instrument to measure atmospheric total peroxy nitrates (PNs) and organic nitrates (ONs) continuously under the condition of high NOx. In TD-CAPS, PNs and ONs are dissociated in heated quartz tubes to form NO2, and the NO2 concentration is measured by cavity attenuated phase shift spectroscopy (CAPS). The original TD-CAPS system overestimates PN and ON concentrations in the presence of high NO concentrations. Our laborato… Show more
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