2020
DOI: 10.5194/amt-13-4317-2020
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A compact incoherent broadband cavity-enhanced absorption spectrometer for trace detection of nitrogen oxides, iodine oxide and glyoxal at levels below parts per billion for field applications

Abstract: Abstract. We present a compact, affordable and robust instrument based on incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) for simultaneous detection of NOx, IO, CHOCHO and O3 in the 400–475 nm wavelength region. The instrument relies on the injection of a high-power LED source in a high-finesse cavity (F∼33 100), with the transmission signal being detected by a compact spectrometer based on a high-order diffraction grating and a charge-coupled device (CCD) camera. A minimum detectable ab… Show more

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Cited by 12 publications
(23 citation statements)
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“…range, with a slope of 1.015  E 0.006 and a correlation factor of 2 R E = 0.9996 (Barbero et al, 2020). Field calibrations were made using a…”
Section: Instrumentationmentioning
confidence: 99%
“…range, with a slope of 1.015  E 0.006 and a correlation factor of 2 R E = 0.9996 (Barbero et al, 2020). Field calibrations were made using a…”
Section: Instrumentationmentioning
confidence: 99%
“…fractions up to 8 ppmv were used, and, applied O 3 mole fractions were kept below 6 ppmv (5.6 ± 1.5 and 4.3 ± 0.5 ppmv in December and January, respectively) during this field study. Ultimate detection limits of 33 and 63 pptv (3σ) for NO x and NO (taking into account the propagation error), respectively, are also achieved within ≈ 20 min of measurement (Barbero et al, 2020), according to an Allan-Werle statistical method (Werle et al, 1993). The instruments were calibrated prior and after field deployment using a stable reference NO 2 source (FlexStream TM Gas Standards Generator, KINTEK Analytical, Inc.), covering a large range of concentrations from the pptv to ppbv range (Barbero et al, 2020).…”
Section: Measurement Of Atmospheric No X and Omentioning
confidence: 90%
“…The twin instruments described in Barbero et al (2020) were used for NO x detection in the 400-475 nm wavelength region. These instruments are based on incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) with a high-power LED source injected in a high-finesse cavity (F ≈ 33,100), and the transmission signal is detected by a compact spectrometer equipped with a charge-coupled device (CCD) camera.…”
Section: Measurement Of Atmospheric No X and Omentioning
confidence: 99%
“…They are closely related to the distribution of oxidants in the atmosphere by terminating the HO x cycle. ONs are also important precursors of secondary organic aerosols (SOAs) (Berkemeier et al, 2016;Lee et al, 2016;Ng et al, 2017;Rollins et al, 2012). Volatile organic compounds (VOCs) are oxidized by OH or O 3 to produce peroxy radicals (RO 2 ), and then RO 2 reacts with NO 2 to produce PNs (Reaction R1).…”
Section: Introductionmentioning
confidence: 99%
“…TD-CRDS and TD-CAPS show high spatial and temporal resolution and good measurement capability (Sadanaga et al, 2016;Sobanski et al, 2016). CEAS (cavity-enhanced absorption spectroscopy) is a powerful technology that can monitor several compounds or species simultaneously with broad absorption bands being detected (Fiedler et al, 2003) and has been applied to measure many species in field studies, such as NO 2 , HONO, NO 3 , N 2 O 5 , IO, glyoxal, and methylglyoxal (Ball et al, 2004;Barbero et al, 2020;Duan et al, 2018;Gherman et al, 2008;Jordan and Osthoff, 2020;Kahan et al, 2012;Langridge et al, 2006;Lechevallier et al, 2019;Liu et al, 2019;Min et al, 2016;Thalman and Volkamer, 2010;Vaughan et al, 2008;Venables et al, 2006;Ventrillard-Courtillot et al, 2010;Ventrillard et al, 2017;Washenfelder et al, 2016Washenfelder et al, , 2008Watt et al, 2009). Organic nitrates have a large range of mixing ratios in the atmosphere that vary from several pptv in warm and remote regions to several parts per billion by volume (ppbv) in polluted regions.…”
mentioning
confidence: 99%