Determination of nitrogen dioxide in air-compressed gas mixtures by quantitative tunable diode laser absorption spectrometry and chemiluminescence detection

Fried, Alan; Sams, Robert L.; Dorko, William D.; Elkins, James W.; Cai, Zhenyuan

doi:10.1021/ac00156a005

Cited by 26 publications

(15 citation statements)

References 29 publications

(31 reference statements)

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“…Most tanks were stable to within 1.0% although a few deteriorated rapidly. Experiments show that NO y is conserved in the tanks and that the decrease in NO 2 is balanced by an increase in HNO 3 as has been reported by Fried et al, (Bertram et al, 2005;Fried et al, 1988).…”

Section: Calibration Of Lif No 2 Instrumentssupporting

confidence: 67%

Fluorescence Methods

and¹,

Cohen²

2006

Analytical Techniques for Atmospheric Measurement

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Section: Calibration Of Lif No 2 Instrumentssupporting

confidence: 67%

Fluorescence Methods

and¹,

Cohen²

2006

Analytical Techniques for Atmospheric Measurement

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“…The plots have a slope equal to the effective NO 2 absorption cross section at 532 nm divided by R L . The largest uncertainty in this determination was the accuracy of the concentration of NO 2 delivered from the cylinder [ Fried et al , 1988]. In what were deemed the best set of experiments, in which the sample lines and regulator were fully passivated, we obtained σ NO2 /R L = (1.30 ± 0.05) × 10 −19 cm 2 and σ NO2 = (1.43 ± 0.07) × 10 −19 cm 2 .…”

Section: Resultsmentioning

confidence: 99%

“…Measurement of NO 2 is more difficult and therefore has been an active area of research. Examples of NO 2 measurement techniques used for atmospheric observations include photolysis followed by O 3 chemiluminescence (P‐CL) [ Kley and McFarland , 1980; Ryerson et al , 2000], laser‐induced fluorescence (LIF) [ Matsumi et al , 2001; Matsumoto et al , 2001; Matsumoto and Kajii , 2003; Thornton et al , 2000], differential optical absorption spectroscopy (DOAS) [ Platt et al , 1979], tunable diode laser absorption spectroscopy (TDLAS) [ Fried et al , 1988], and cavity ring‐down spectroscopy (CARDS) [ Evertsen et al , 2002; Kasyutich et al , 2003; Kebabian et al , 2005; Mazurenka et al , 2003]. In P‐CL, NO 2 is photolytically converted to NO, which is measured by O 3 chemiluminescence [ Kley and McFarland , 1980; Ryerson et al , 2000].…”

Section: Introductionmentioning

confidence: 99%

Measurement of atmospheric NO₂ by pulsed cavity ring‐down spectroscopy

et al. 2006

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[1] We have constructed a pulsed cavity ring-down spectrometer (CARDS) for simultaneous measurements of nitrogen dioxide (NO 2 ), the nitrate radical (NO 3 ), and dinitrogen pentoxide (N 2 O 5 ) in the atmosphere. In this paper, we describe the development of the instrument to measure NO 2 via its absorption at 532 nm. The NO 2 detection channel was calibrated against a NIST traceable calibration standard as well as a photolysis-chemiluminescence (P-CL) NO 2 detector. The absorption cross section of NO 2 at 532 nm was determined to be (1.45 ± 0.06) Â 10 À19 cm 2 . The NO 2 detection limit (1s) for 1 s data is 40 pptv, and the instrument response is accurate within ±4% (1s) under laboratory conditions. The linear dynamic range of the instrument has been verified from the detection limit to above 200 ppbv (r 2 > 99.99%). For field measurements it is necessary to correct the CARDS NO 2 signal for absorption by ozone. Under ambient conditions we report 1 s NO 2 CARDS data with total uncertainty ±(4%, 60 pptv + 0.4 Â (pptv/ppbv) Â O 3 ) (1s). The instrument was deployed in the field during the New England Air Quality Study-International Transport and Chemical Transformation on board the NOAA research vessel Ronald H. Brown in the summer of 2004 and in Boulder, Colorado, in the winter of 2005. In both campaigns, CARDS and P-CL NO 2 measurements were highly correlated (r 2 > 98%), indicating the absence of interfering gas phase absorbers at 532 nm other than ozone and the suitability of CARDS to measure NO 2 in the troposphere.

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“…A 10 min equilibration time was used between each point in the temperature dependence studies. The amount of formaldehyde produced was measured using a lead salt tunable diode laser system which has been described in detail previously [15]. Briefly, approximately one-third of the gas exiting the formaldehyde generator was drawn into a 30 L variable length multipass sample cell.…”

Section: Methodsmentioning

confidence: 99%

On-demand generation of a formaldehyde-in-air standard

Chu¹,

Thorn²,

Sams³

et al. 1997

J. Res. Natl. Inst. Stand. Technol.

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The feasibility of using catalytic conversion of methanol to formaldehyde to produce standard amount of substance fractions of formaldehyde was examined. The conversion efficiencies of several catalysts were measured as a function of temperature, balance gas, catalyst bed length, and methanol amount of substance fraction in an effort to identify conditions which yield high and consistent conversion of methanol to formaldehyde. The highest observed conversion rate was (97 ± 4) % using a molybdenum catalyst, where the error is the 2σ uncertainty. The conversion efficiency was found to be consistent over repeated cycles and over a long lifetime test, suggesting that a molybdenum catalyst is a viable candidate for a standard formaldehyde generator, particularly for low formaldehyde amount of substance fractions (< 15 μmol/mol).

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Determination of nitrogen dioxide in air-compressed gas mixtures by quantitative tunable diode laser absorption spectrometry and chemiluminescence detection

Cited by 26 publications

References 29 publications

Fluorescence Methods

Fluorescence Methods

Measurement of atmospheric NO₂ by pulsed cavity ring‐down spectroscopy

On-demand generation of a formaldehyde-in-air standard

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Determination of nitrogen dioxide in air-compressed gas mixtures by quantitative tunable diode laser absorption spectrometry and chemiluminescence detection

Cited by 26 publications

References 29 publications

Fluorescence Methods

Fluorescence Methods

Measurement of atmospheric NO2 by pulsed cavity ring‐down spectroscopy

On-demand generation of a formaldehyde-in-air standard

Contact Info

Product

Resources

About

Measurement of atmospheric NO₂ by pulsed cavity ring‐down spectroscopy