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@ARTICLE{Duan:866654,
author = {Duan, Jun and Qin, Min and Ouyang, Bin and Fang, Wu and Li,
Xin and Lu, Keding and Tang, Ke and Liang, Shuaixi and Meng,
Fanhao and Hu, Zhaokun and Xie, Pinhua and Liu, Wenqing and
Häsler, Rolf},
title = {{D}evelopment of an incoherent broadband cavity-enhanced
absorption spectrometer for in situ measurements of {HONO}
and {NO} 2},
journal = {Atmospheric measurement techniques},
volume = {11},
number = {7},
issn = {1867-8548},
address = {Katlenburg-Lindau},
publisher = {Copernicus},
reportid = {FZJ-2019-05733},
pages = {4531 - 4543},
year = {2018},
abstract = {Gaseous nitrous acid (HONO) is an important source of OH
radicals in the troposphere. However, its source, especially
that during daytime hours remains unclear. We present an
instrument for simultaneous unambiguous measurements of HONO
and NO2 with high time resolution based on incoherent
broadband cavity-enhanced absorption spectroscopy (IBBCEAS).
To achieve robust performance and system stability under
different environment conditions, the current IBBCEAS
instrument has been developed with significant improvements
in terms of efficient sampling as well as resistance against
vibration and temperature change, and the IBBCEAS instrument
also has low power consumption and a compact design that can
be easily deployed on different platforms powered by a
high-capacity lithium ion battery. The effective cavity
length of the IBBCEAS was determined using the absorption of
O2-O2 to account for the “shortening” effect caused by
the mirror purge flows. The wall loss for HONO was estimated
to be $2.0 \%$ via a HONO standard generator. Measurement
precisions (2σ) for HONO and NO2 are about 180 and
340 ppt in 30 s, respectively. A field inter-comparison
was carried out at a rural suburban site in Wangdu, Hebei
Province, China. The concentrations of HONO and NO2 measured
by IBBCEAS were compared with a long optical path absorption
photometer (LOPAP) and a NOx analyzer (Thermo Fisher
Electron Model 42i), and the results showed very good
agreement, with correlation coefficients (R2) of HONO and
NO2 being ∼0.89 and ∼0.95, respectively; in addition,
vehicle deployments were also tested to enable mobile
measurements of HONO and NO2, demonstrating the promising
potential of using IBBCEAS for in situ, sensitive, accurate
and fast simultaneous measurements of HONO and NO2 in the
future.},
cin = {IEK-8},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {243 - Tropospheric trace substances and their
transformation processes (POF3-243)},
pid = {G:(DE-HGF)POF3-243},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000468492900001},
doi = {10.5194/amt-11-4531-2018},
url = {https://juser.fz-juelich.de/record/866654},
}