Dr. Jun Duan Profile

Dr. Jun Duan

at CAS

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Proceedings Article | 18 March 2021 Paper

Measurements of glyoxal using broadband cavity-enhanced absorption spectrometer on mobile platforms in Hefei

Jun Duan, Helu Zhang, Pinhua Xie, Wenqing Liu

Proceedings Volume 11780, 1178011 (2021) https://doi.org/10.1117/12.2590031

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Glyoxal is one of the most important volatile organic compounds in the atmosphere and the tracer of the photochemical oxidation process of VOCs, which can effectively reflect the emission level and reactivity of atmospheric VOCs. Due to the very low concentration of glyoxal, general measurement technology is difficult to accurately and fast detect glyoxal. Here, we reported a self-designed broadband cavity-enhanced absorption spectrometer (BBCEAS) on mobile platforms for measurements of atmospheric glyoxal, and for 30 seconds averaged data the average detection limits (2σ) for glyoxal was about 0.024 ppb. To measure the spatial distribution of glyoxal, the BBCEAS instrument was deployed in a car and gas was draw into the BBCEAS instrument through an inlet fixed on the roof of the car. The spatial distribution of glyoxal in Hefei was measured on Sep 8th , 2020, the measured glyoxal concentrations ranged from 0.010 ppb to 0.258 ppb. The results demonstrated that the BBCEAS instrument has overcome the effect of vibrations for the measurements on mobile platforms and can get the spatial distribution of glyoxal.

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