Thermal dissociation cavity attenuated phase shift spectroscopy for continuous measurement of total peroxy and organic nitrates in the clean atmosphere
作者： Yasuhiro Sadanaga , Ryo Takaji , Ayana Ishiyama , Kazuo Nakajima , Atsushi Matsuki
DOI: 10.1063/1.4958167
关键词:
摘要: A thermal dissociation cavity attenuated phase shift spectroscopy (TD-CAPS) instrument was developed for measuring total peroxy nitrates (PNs) and organic (ONs) concentrations in the clean atmosphere. This is easy to operate can be applied continuous measurement of PNs ONs. continuously measurable system convenient perform observations, especially remote areas. Three lines (NO2, PNs, ONs lines) were used dissociation. The NO2 line contains a quartz tube that not heated, while PN ON contain tubes are heated at 433 K 633 K, respectively. NO2, + obtained from PN, lines, lower limit values detection (3σ) estimated 21 parts per trillion by volume with an integration time 2 min. selectively thermally decomposed formed quantitatively. In line, both produce quantitatively, but partial decomposition HNO3 interfered measurement. Therefore, scrubber required before line. Continuous observations conducted TD-CAPS area, performed well obtaining concentrations.
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