Continuous wave cavity ring-down spectroscopy measurement of NO2 mixing ratios in ambient air

The Analyst ◽  
2005 ◽  
Vol 130 (12) ◽  
pp. 1595 ◽  
Author(s):  
Ryuichi Wada ◽  
Andrew J. Orr-Ewing
Keyword(s):  
Continuous Wave ◽  
Ambient Air ◽  
Cavity Ring Down Spectroscopy ◽  
Mixing Ratios ◽  
Spectroscopy Measurement ◽  
Cavity Ring Down

Trace detection of C2H2 in ambient air using continuous wave cavity ring-down spectroscopy combined with sample pre-concentration

2007 ◽  
Vol 90 (1) ◽  
pp. 1-9 ◽  
Author(s):  
M. Pradhan ◽  
R.E. Lindley ◽  
R. Grilli ◽  
I.R. White ◽  
D. Martin ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Ambient Air ◽  
Trace Detection ◽  
Cavity Ring Down Spectroscopy ◽  
Cavity Ring Down

scholarly journals A gas chromatograph for quantification of peroxycarboxylic nitric anhydrides calibrated by thermal dissociation cavity ring-down spectroscopy

2014 ◽  
Vol 7 (6) ◽  
pp. 5953-6019
Author(s):  
T. W. Tokarek ◽  
J. A. Huo ◽  
C. A. Odame-Ankrah ◽  
D. Hammoud ◽  
Y. M. Taha ◽  
...  
Keyword(s):  
Thermal Dissociation ◽  
Ambient Air ◽  
Calibration Method ◽  
Ionization Mass ◽  
Molecular Formula ◽  
Data Set ◽  
Cavity Ring Down Spectroscopy ◽  
Mixing Ratios ◽  
Advantages And Disadvantages ◽  
Cavity Ring Down

Abstract. The peroxycarboxylic nitric anhydrides (PANs, molecular formula RC(O)O2NO2) can readily be observed by gas chromatography coupled to electron capture detection (PAN-GC). Calibration of a PAN-GC remains a challenge because the response factors (RF's) differ for each of the PANs and because their synthesis in sufficiently high purity is non-trivial, in particular for PANs containing unsaturated side chains. In this manuscript, a PAN-GC and its calibration using diffusion standards, whose output was quantified by blue diode laser thermal dissociation cavity ring-down spectroscopy (TD-CRDS), are described. The PAN-GC peak areas correlated linearly with total peroxy nitrate (ΣPN) mixing ratios measured by TD-CRDS (r > 0.96). Accurate determination of RF's required the concentrations of PAN impurities in the synthetic standards to be subtracted from ΣPN. The PAN-GC and its TD-CRDS calibration method were deployed during ambient air measurement campaigns in Abbotsford, BC, from 20 July to 5 August, 2012, and during the Fort McMurray Oil Sands Strategic Investigation of Local Sources (FOSSILS) campaign at the AMS13 ground site in Fort McKay, AB, from 10 August to 5 September 2013. For the Abbotsford data set, the PAN-GC mixing ratios were compared and agreed with those determined in parallel by thermal dissociation chemical ionization mass spectrometry (TD-CIMS). Advantages and disadvantages of the PAN measurement techniques used in this work and the utility of TD-CRDS as a PAN-GC calibration method are discussed.

scholarly journals A compact, high-purity source of HONO validated by Fourier transform infrared and thermal-dissociation cavity ring-down spectroscopy

2020 ◽  
Vol 13 (8) ◽  
pp. 4159-4167 ◽  
Author(s):  
Nicholas J. Gingerysty ◽  
Hans D. Osthoff
Keyword(s):  
Fourier Transform ◽  
Thermal Dissociation ◽  
Fourier Transform Infrared ◽  
Ambient Air ◽  
Cavity Ring Down Spectroscopy ◽  
Mixing Ratios ◽  
Gas Streams ◽  
Ambient Air Measurements ◽  
By Products ◽  
Cavity Ring Down

Abstract. A well-characterized source of nitrous acid vapour (HONO) is essential for accurate ambient air measurements by instruments requiring external calibration. In this work, a compact HONO source is described in which gas streams containing dilute concentrations of HONO are generated by flowing hydrochloric acid (HCl) vapour emanating from a permeation tube over continuously agitated dry sodium nitrite (NaNO2) heated to 50 ∘C. Mixing ratios of HONO and potential by-products including NO, NO2, and nitrosyl chloride (ClNO) were quantified by Fourier transform infrared (FTIR) and thermal-dissociation cavity ring-down spectroscopy (TD-CRDS). A key parameter is the concentration of HCl, which needs to be kept small (<4 ppmv) to avoid ClNO formation. The source produces gas streams containing HONO in air in >95 % purity relative to other nitrogen oxides. The source output is rapidly tuneable and stabilizes within 90 min. Combined with its small size and portability, this source is highly suitable for calibration of HONO instruments in the field.

scholarly journals A gas chromatograph for quantification of peroxycarboxylic nitric anhydrides calibrated by thermal dissociation cavity ring-down spectroscopy

2014 ◽  
Vol 7 (10) ◽  
pp. 3263-3283 ◽  
Author(s):  
T. W. Tokarek ◽  
J. A. Huo ◽  
C. A. Odame-Ankrah ◽  
D. Hammoud ◽  
Y. M. Taha ◽  
...  
Keyword(s):  
Thermal Dissociation ◽  
Ambient Air ◽  
Calibration Method ◽  
Molecular Formula ◽  
Response Factors ◽  
Data Set ◽  
Cavity Ring Down Spectroscopy ◽  
Mixing Ratios ◽  
Advantages And Disadvantages ◽  
Cavity Ring Down

Abstract. The peroxycarboxylic nitric anhydrides (PANs, molecular formula: RC(O)O2NO2) can readily be observed by gas chromatography (PAN-GC) coupled to electron capture detection. Calibration of a PAN-GC remains a challenge, because the response factors differ for each of the PANs, and because their synthesis in sufficiently high purity is non-trivial, in particular for PANs containing unsaturated side chains. In this manuscript, a PAN-GC and its calibration using diffusion standards, whose output was quantified by blue diode laser thermal dissociation cavity ring-down spectroscopy (TD-CRDS), are described. The PAN-GC peak areas correlated linearly with total peroxy nitrate (ΣPN) mixing ratios measured by TD-CRDS (r > 0.96). Accurate determination of response factors required the concentrations of PAN impurities in the synthetic standards to be subtracted from ΣPN. The PAN-GC and its TD-CRDS calibration method were deployed during ambient air measurement campaigns in Abbotsford, BC, from 20 July to 5 August 2012, and during the Fort McMurray Oil Sands Strategic Investigation of Local Sources (FOSSILS) campaign at the AMS13 ground site in Fort McKay, AB, from 10 August to 5 September 2013. The PAN-GC limits of detection for PAN, PPN, and MPAN during FOSSILS were 1, 2, and 3 pptv, respectively. For the Abbotsford data set, the PAN-GC mixing ratios were compared, and agreed with those determined in parallel by thermal dissociation chemical ionization mass spectrometry (TD-CIMS). Advantages and disadvantages of the PAN measurement techniques used in this work and the utility of TD-CRDS as a PAN-GC calibration method are discussed.

scholarly journals A compact, high-purity source of HONO validated by Fourier Transform Infrared and Thermal Dissociation Cavity Ring-down Spectroscopy

2020 ◽  
Author(s):  
Nicholas J. Gingerysty ◽  
Hans D. Osthoff
Keyword(s):  
Fourier Transform ◽  
Thermal Dissociation ◽  
Fourier Transform Infrared ◽  
Ambient Air ◽  
Cavity Ring Down Spectroscopy ◽  
Mixing Ratios ◽  
Gas Streams ◽  
Ambient Air Measurements ◽  
By Products ◽  
Cavity Ring Down

Abstract. A well-characterized source of nitrous acid vapour (HONO) is essential for accurate ambient air measurements by instruments requiring external calibration. In this work, a compact HONO source is described in which gas streams containing dilute concentrations of HONO are generated by flowing hydrochloric acid (HCl) vapour emanating from a permeation tube over continuously agitated dry sodium nitrite (NaNO2) heated to 50 ºC. Mixing ratios of HONO and potential by-products including NO, NO2 and nitrosyl chloride (ClNO) were quantified by Fourier Transform Infrared (FTIR) and thermal dissociation cavity ring-down spectroscopy (TD-CRDS). A key parameter is the concentration of HCl, which needs to be kept small ( 97 % purity relative to other nitrogen oxides. The source output is rapidly tuneable and stabilizes within 90 min. Combined with its small size and portability this source is highly suitable for calibration of HONO instruments in the field.

Mid-infrared continuous wave cavity ring-down spectroscopy of a pulsed hydrocarbon plasma

2013 ◽  
Vol 565 ◽  
pp. 132-137 ◽  
Author(s):  
Dongfeng Zhao ◽  
Joseph Guss ◽  
Anton J. Walsh ◽  
Harold Linnartz
Keyword(s):  
Continuous Wave ◽  
Cavity Ring Down Spectroscopy ◽  
Mid Infrared ◽  
Cavity Ring Down

Etaloning Effects in Continuous-Wave Cavity Ring down Spectroscopy

2008 ◽  
Vol 35 (10) ◽  
pp. 1563-1566
Author(s):  
谭中奇 Tan Zhongqi ◽  
龙兴武 Long Xingwu ◽  
黄云 Huang Yun ◽  
吴素勇 Wu Suyong
Keyword(s):  
Continuous Wave ◽  
Cavity Ring Down Spectroscopy ◽  
Cavity Ring Down

Measurements of Extinction by Aerosol Particles in the Near-Infrared Using Continuous Wave Cavity Ring-Down Spectroscopy

2011 ◽  
Vol 115 (5) ◽  
pp. 774-783 ◽  
Author(s):  
Daniel Mellon ◽  
Simon J. King ◽  
Jin Kim ◽  
Jonathan P. Reid ◽  
Andrew J. Orr-Ewing
Keyword(s):  
Near Infrared ◽  
Continuous Wave ◽  
Aerosol Particles ◽  
Cavity Ring Down Spectroscopy ◽  
Cavity Ring Down
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