We present direct indoor measurements of the nitrate radical (NO₃) and dinitrogen pentoxide (N₂O₅) produced from combustion cooking emissions in a residential kitchen. When the indoor ozone (O₃) concentration was low (∼4 ppbv), nitric oxide (NO) emitted from gas stove combustion suppressed NO₃ formation. However, at moderate O₃ levels (∼40 ppbv), measured NO₃ concentrations reached 3–4 pptv, and the indoor NO₃ reactivity loss rate coefficient reached 0.8 s^–1. A box model of known chemistry agrees with the reactivity estimate and shows that moderate O₃ levels led to a nitrate radical production rate of 7 ppbv h^–1. These indoor NO₃ production rates and reactivities are much higher than those typically found outdoors. We conclude that at low O₃ levels indoor combustion suppresses nitrate radical chemistry, but when sufficient O₃ enters residences from outdoors or is emitted directly from indoor sources, gas stove combustion emissions promote indoor NO₃ chemistry.

中文翻译：

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住宅厨房中NO ₃和N ₂ O _5的测量

我们介绍了住宅厨房中燃烧烹饪排放物产生的硝酸根（NO ₃）和五氧化二氮（N ₂ O ₅）的直接室内测量值。当室内臭氧（O ₃）浓度较低（〜4 ppbv）时，燃气灶燃烧产生的一氧化氮（NO）会抑制NO _3的形成。但是，在中等O ₃水平（〜40 ppbv）下，测得的NO ₃浓度达到3-4 pptv，室内NO _3的反应性损失率系数达到0.8 s ^–1。已知化学的盒模型与反应性估计值吻合，表明中等O ₃的水平导致硝酸根自由基的产生率为7 ppbv h ^–1。这些室内NO _3的产生率和反应性比通常在室外发现的要高得多。我们得出的结论是，在低O ₃水平下，室内燃烧会抑制硝酸根自由基化学反应，但是当足够的O ₃从室外进入住宅或直接从室内排放时，燃气灶的燃烧排放会促进室内NO _3的化学反应。