27 Oct 2020
27 Oct 2020
Study on the measurement of isoprene by Differential Optical Absorption Spectroscopy
- 1Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
- 2Institute of Eco-Chongming (IEC), No. 20 Cuiniao Road, Shanghai 202162, China
- 3Institute of Atmospheric Sciences, Fudan University, Shanghai, 200433, China
- 4Shanghai Environmental Monitoring Center, Shanghai, 200235, China
- 1Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
- 2Institute of Eco-Chongming (IEC), No. 20 Cuiniao Road, Shanghai 202162, China
- 3Institute of Atmospheric Sciences, Fudan University, Shanghai, 200433, China
- 4Shanghai Environmental Monitoring Center, Shanghai, 200235, China
Abstract. In this paper, the continuous on-line measurements of isoprene in the atmosphere have been carried out by using the Differential Optical Absorption Spectroscopy (DOAS) in the band of 202.71–227.72 nm for the first time. Under the zero optical path in the laboratory, different equivalent concentrations of isoprene were measured by the combination of known concentration gas and series calibration cells. The correlation between the measured concentrations and the equivalent concentrations was 0.9996, and the slope was 1.065. The correlation coefficient between DOAS and on-line VOCs instrument is 0.85 and the slope is 0.86 in the comparison of 23 days field observation. It is estimated that the detection limit of isoprene with DOAS is about 0.1 ppb at an optical path of 75 m, and it is verified that isoprene could be measured in the ultraviolet absorption band using DOAS method with high temporal resolution and low maintenance cost.
Song Gao et al.


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RC1: 'Review to Sang Gao et al.', Anonymous Referee #1, 26 Nov 2020
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AC1: 'Reply on RC1', Bin Zhou, 19 Jan 2021
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AC1: 'Reply on RC1', Bin Zhou, 19 Jan 2021
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RC2: 'Comments to "Study on the measurement of isoprene by Differential Optical Absorption Spectroscopy"', Anonymous Referee #2, 30 Nov 2020
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AC2: 'Reply on RC2', Bin Zhou, 19 Jan 2021
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AC2: 'Reply on RC2', Bin Zhou, 19 Jan 2021
Song Gao et al.
Song Gao et al.
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