关键词: 二氧化氮, 有机硝酸酯, 测量技术, 大气化学

Abstract: Both nitrogen dioxide (NO2) and organic nitrates (ONs) are very important trace gases in the atmosphere. The concentration of NO2 is one of the most important indicators to assess the degree of air pollution. In addition, NO2 is the main source of tropospheric ozone and a significant precursor of photochemical smog and acid rain. Organic nitrates in the atmosphere are stable at low temperature and easy to decompose at high temperature, making them a potential source of NO2, and in other hand, they also have a certain impact on the global distribution of O3. Therefore, accurately obtaining the concentration of NO2 and ONs in the atmosphere is of great significance for studying atmospheric chemical processes. As early as the 1950s and 1960s, chemiluminescence and spectrophotometric techniques were used to measure NO2 in the ambient atmosphere. With the development of science and technology, differential optical absorption spectroscopy, laser induced fluorescence spectroscopy, tunable diode laser absorption spectroscopy, cavity attenuated phase shift spectroscopy, cavity ring down spectroscopy, and cavity enhanced absorption spectroscopy have been used to measure NO2 in various environments. Accurate measurement of ONs is of great importance in nitrogen cycle research. At present, the main measurement techniques of ONs include gas chromatography with electron capture detection and indirect measurements through pyrolysis conversion of ONs to NO2. The research status and development tendency of NO2 and ONs detection technologies in the environment both at home and abroad are reviewed, the principles, advantages and disadvantages of existing measurement methods are introduced and compared in detail, and the applications of various research methods in field observations are summarized.

Key words: nitrogen dioxide, organic nitrates, measurement technology, atmospheric chemistry