Intercomparison of the DOAS and LOPAP techniques for the detection of nitrous acid (HONO)

Kleffmann, Jörg; Lörzer, J. C.; Wiesen, Peter; Kern, Christoph; Trick, S.; Volkamer, Rainer; Ródenas, Milagros; Wirtz, Klaus

doi:10.1016/j.atmosenv.2006.03.027

Cited by 183 publications

(188 citation statements)

References 43 publications

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“…Excellent agreement between LOPAP and LP-DOAS has been obtained (slope=0.987±0.015; r 2 =0.87) . The results of the comparison generally showed consistent agreement, although there were occasionally significant differences that could be attributed to either an NO 2 artefact of the DOAS instrument or possible interferences in the chemical methods (Heland et al 2001;Kleffmann et al 2006;Stutz et al 2010). CIMS is a powerful and sensitive technique in measuring many trace gases in the atmosphere.…”

Section: Responsible Editor: Gerhard Lammelmentioning

confidence: 72%

“…Taking into consideration the important role of the HONO photodissociation in the atmosphere, various techniques have been developed and deployed for its atmospheric measurements, such as long path differential optical absorption spectroscopy (LP-DOAS) and chemical techniques (Febo et al 1996;Spindler et al 2003), long path absorption photometry (LOPAP) (Heland et al 2001;Kleffmann et al 2006) and ion-drift chemical ionization mass spectrometry (ID-CIMS) (Hirokawa et al 2009;Levy et al 2014). Time resolution, sensitivity, the absence of any artefact and the capability to perform measurements under diverse environmental conditions are paramount of importance in the performance of analytical instruments.…”

Section: Responsible Editor: Gerhard Lammelmentioning

confidence: 99%

“…The LOPAP technique has been described in detail elsewhere (Heland et al 2001;Kleffmann et al 2002Kleffmann et al , 2006 and is briefly summarized here. The instrument was composed of two sections: a sampling unit and a detection unit.…”

Section: Lopap (Long Path Absorption Photometer)mentioning

confidence: 99%

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Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Bernard

Cazaunau

Grosselin

et al. 2015

Environ Sci Pollut Res

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Nitrous acid (HONO), as a precursor of the hydroxyl radical (OH), plays an important role in the photochemistry of the troposphere, especially in the polluted urban atmosphere. A field campaign was conducted to measure atmospheric HONO concentration and that of other pollutants (such as NO 2 and particle mass concentration) in the autumn of 2009 at Shanghai urban areas. HONO mixing ratios were simultaneously measured by three different techniques: long path absorption photometer (LOPAP), differential optical absorption spectroscopy (DOAS) and chemical ionization mass spectrometer (CIMS). The measurements showed that the mixing ratios of HONO were highly variable and depended strongly on meteorological parameters. The HONO levels ranged from 0.5 to 7 ppb with maximum values during early morning and minimum levels during late afternoon. The three instruments reproduced consistent diurnal pattern of HONO concentrations with higher concentration during the night compared to the daylight hours. Comparison of HONO LOPAP /HONO CIMS ratios during daytime and nighttime periods exhibited a non-systematic disagreement of 0.93 and 1.16, respectively. This would indicate different chemical compositions of sampled air for the LOPAP and the CIMS instruments during daytime and nighttime periods, which have possibly affected measurements. Mean HONO concentration reported by LOPAP was 33 % higher than by DOAS on the whole period with no significant difference between daytime and nighttime periods. This revealed a systematic deviation from both instruments. The present data provides complementary information of HONO ambient levels in the atmosphere of Shanghai urban areas.

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Section: Responsible Editor: Gerhard Lammelmentioning

confidence: 72%

Section: Responsible Editor: Gerhard Lammelmentioning

confidence: 99%

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Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Bernard

Cazaunau

Grosselin

et al. 2015

Environ Sci Pollut Res

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“…There has been extensive testing of the chemical techniques for interferences, which have been shown to become particularly important at low NO x concentrations. 343,344 Specific spectroscopic identification is clearly preferred, and development of such methods with ppt sensitivity is a high priority for both laboratory and field studies.…”

Section: Heterogeneous Reactions Of Oxides Of Nitrogen On Airborne Dumentioning

confidence: 99%

Reactions at surfaces in the atmosphere: integration of experiments and theory as necessary (but not necessarily sufficient) for predicting the physical chemistry of aerosols

Finlayson-Pitts

2009

Phys. Chem. Chem. Phys.

231

272

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“…Multiple reflection cells, however, allow the setup of DOAS measurements with long light paths inside simulation chambers of different sizes (e.g. De Haan et al, 1999;Kleffmann et al, 2006;Schlosser et al, 2006;Bossmeyer, 2006).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the formaldehyde differential absorption cross section at high and low spectral resolution in the simulation chamber SAPHIR

Brauers¹,

Bossmeyer²,

Dorn³

et al. 2007

Atmos. Chem. Phys.

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Abstract.The results from a simulation chamber study on the formaldehyde (HCHO) absorption cross section in the UV spectral region are presented. We performed 4 experiments at ambient HCHO concentrations with simultaneous measurements of two DOAS instruments in the atmosphere simulation chamber SAPHIR in Jülich. The two instruments differ in their spectral resolution, one working at 0.2 nm (broad-band, BB-DOAS), the other at 2.7 pm (high-resolution, HR-DOAS). Both instruments use dedicated multi reflection cells to achieve long light path lengths of 960 m and 2240 m, respectively, inside the chamber. During two experiments HCHO was injected into the clean chamber by thermolysis of well defined amounts of paraformaldehyde reaching mixing rations of 30 ppbV at maximum. The HCHO concentration calculated from the injection and the chamber volume agrees with the BB-DOAS measured value when the absorption cross section of Meller and Moortgat (2000) and the temperature coefficient of Cantrell (1990) were used for data evaluation. In two further experiments we produced HCHO in-situ from the ozone + ethene reaction which was intended to provide an independent way of HCHO calibration through the measurements of ozone and ethene. However, we found an unexpected deviation from the current understanding of the ozone + ethene reaction when CO was added to suppress possible oxidation of ethene by OH radicals. The reaction of the Criegee intermediate with CO could be 240 times slower than currently assumed. Based on the BB-DOAS measurements we could deduce a high-resolution cross section for HCHO which was not measured directly so far.

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Intercomparison of the DOAS and LOPAP techniques for the detection of nitrous acid (HONO)

Cited by 183 publications

References 43 publications

Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Reactions at surfaces in the atmosphere: integration of experiments and theory as necessary (but not necessarily sufficient) for predicting the physical chemistry of aerosols

Investigation of the formaldehyde differential absorption cross section at high and low spectral resolution in the simulation chamber SAPHIR

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