Price of NO3 N2O5 nitrogen-containing compounds

Online measurement based on cavity ring down spectroscopy technology (NO3/N2O5). Select a laser with a center wavelength of 662 ± 1nm and two optical resonators composed of two sets of high-power mirrors.firstDirect measurement of NO3 radicals in one cavity; The second chamber measures the sum of NO3 and N2O5 (where N2O5 is converted to NO3 by heating), thus achieving real-time measurement of NO3 and N2O5.

NO₃Free radicals are key species in atmospheric chemical reactions, and for certain volatile organic compounds (VOCs) (especially terpenes), dimethyl sulfide (DMS), and olefins, the oxidation ability of nitrogen trioxide even exceeds that of daytime OH free radicals. In addition, it affects the nitrogen oxides NO in the atmosphere_x（NO/NO₂）Non photochemical conversion to HNO₃The formation of nitrate aerosols also plays a crucial role. Given that NO₃The key role of free radicals in atmospheric reactions, accurate measurement of their concentration levels and variation patterns is of great significance for studying nighttime atmospheric chemistry. Due to NO₃The high reactivity, short lifespan, and extremely low concentration of free radicals pose challenges for their accurate measurement.